# 3.4.2
[diff](https://github.com/prettier/prettier/compare/3.4.1...3.4.2)
#### Treat U+30A0 & U+30FB in Katakana Block as CJK ([#16796](https://github.com/prettier/prettier/pull/16796) by [@tats-u](https://github.com/tats-u))
Prettier doesn't treat U+30A0 & U+30FB as Japanese. U+30FB is commonly used in Japanese to represent the delimitation of first and last names of non-Japanese people or “andâ€. The following “C言語・C++・Go・Rust†means “C language & C++ & Go & Rust†in Japanese.
```md
C言
語
・
C++
・
Go
・
Rust
C言語・ C++ ・ Go ・ Rust
C言語・C++・Go・Rust
```
U+30A0 can be used as the replacement of the `-` in non-Japanese names (e.g. “Saint-Saëns†(Charles Camille Saint-Saëns) can be represented as “サン゠サーンス†in Japanese), but substituted by ASCII hyphen (U+002D) or U+FF1D (full width hyphen) in many cases (e.g. “サン=サーンス†or “サンï¼ã‚µãƒ¼ãƒ³ã‚¹â€).
#### Fix comments print on class methods with decorators ([#16891](https://github.com/prettier/prettier/pull/16891) by [@fisker](https://github.com/fisker))
```jsx
// Input
class A {
@decorator
/**
* The method description
*
*/
async method(foo: Foo, bar: Bar) {
console.log(foo);
}
}
// Prettier 3.4.1
class A {
@decorator
async /**
* The method description
*
*/
method(foo: Foo, bar: Bar) {
console.log(foo);
}
}
// Prettier 3.4.2
class A {
@decorator
/**
* The method description
*
*/
async method(foo: Foo, bar: Bar) {
console.log(foo);
}
}
```
#### Fix non-idempotent formatting ([#16899](https://github.com/prettier/prettier/pull/16899) by [@seiyab](https://github.com/seiyab))
This bug fix is not language-specific. You may see similar change in any languages. This fixes regression in 3.4.0 so change caused by it should yield same formatting as 3.3.3.
```jsx
// Input
;
```
# 3.4.1
[diff](https://github.com/prettier/prettier/compare/3.4.0...3.4.1)
#### Remove unnecessary parentheses around assignment in `v-on` ([#16887](https://github.com/prettier/prettier/pull/16887) by [@fisker](https://github.com/fisker))
```vue
```
# 3.4.0
[diff](https://github.com/prettier/prettier/compare/3.3.3...3.4.0)
🔗 [Release Notes](https://prettier.io/blog/2024/11/26/3.4.0.html)
# 3.3.3
[diff](https://github.com/prettier/prettier/compare/3.3.2...3.3.3)
#### Add parentheses for nullish coalescing in ternary ([#16391](https://github.com/prettier/prettier/pull/16391) by [@cdignam-segment](https://github.com/cdignam-segment))
This change adds clarity to operator precedence.
```js
// Input
foo ? bar ?? foo : baz;
foo ?? bar ? a : b;
a ? b : foo ?? bar;
// Prettier 3.3.2
foo ? bar ?? foo : baz;
foo ?? bar ? a : b;
a ? b : foo ?? bar;
// Prettier 3.3.3
foo ? (bar ?? foo) : baz;
(foo ?? bar) ? a : b;
a ? b : (foo ?? bar);
```
#### Add parentheses for decorator expressions ([#16458](https://github.com/prettier/prettier/pull/16458) by [@y-schneider](https://github.com/y-schneider))
Prevent parentheses around member expressions or tagged template literals from being removed to follow the stricter parsing rules of TypeScript 5.5.
```ts
// Input
@(foo`tagged template`)
class X {}
// Prettier 3.3.2
@foo`tagged template`
class X {}
// Prettier 3.3.3
@(foo`tagged template`)
class X {}
```
#### Support `@let` declaration syntax ([#16474](https://github.com/prettier/prettier/pull/16474) by [@sosukesuzuki](https://github.com/sosukesuzuki))
Adds support for Angular v18 `@let` declaration syntax.
Please see the following code example. The `@let` declaration allows you to define local variables within the template:
```html
@let name = 'Frodo';
Dashboard for {{name}}
Hello, {{name}}
```
For more details, please refer to the excellent blog post by the Angular Team: [Introducing @let in Angular](https://blog.angular.dev/introducing-let-in-angular-686f9f383f0f).
We also appreciate the Angular Team for kindly answering our questions to implement this feature.
# 3.3.2
[diff](https://github.com/prettier/prettier/compare/3.3.1...3.3.2)
#### Fix handlebars path expressions starts with `@` ([#16358](https://github.com/prettier/prettier/pull/16358) by [@Princeyadav05](https://github.com/Princeyadav05))
```hbs
{{! Input }}
{{@x.y.z}}
{{! Prettier 3.3.1 }}
{{@x}}
{{! Prettier 3.3.2 }}
{{@x.y.z}}
```
# 3.3.1
[diff](https://github.com/prettier/prettier/compare/3.3.0...3.3.1)
#### Preserve empty lines in front matter ([#16347](https://github.com/prettier/prettier/pull/16347) by [@fisker](https://github.com/fisker))
```markdown
---
foo:
- bar1
- bar2
- bar3
---
Markdown
---
foo:
- bar1
- bar2
- bar3
---
Markdown
---
foo:
- bar1
- bar2
- bar3
---
Markdown
```
#### Preserve explicit language in front matter ([#16348](https://github.com/prettier/prettier/pull/16348) by [@fisker](https://github.com/fisker))
```markdown
---yaml
title: Hello
slug: home
---
---
title: Hello
slug: home
---
---yaml
title: Hello
slug: home
---
```
#### Avoid line breaks in import attributes ([#16349](https://github.com/prettier/prettier/pull/16349) by [@fisker](https://github.com/fisker))
```jsx
// Input
import something from "./some-very-very-very-very-very-very-very-very-long-path.json" with { type: "json" };
// Prettier 3.3.0
import something from "./some-very-very-very-very-very-very-very-very-long-path.json" with { type:
"json" };
// Prettier 3.3.1
import something from "./some-very-very-very-very-very-very-very-very-long-path.json" with { type: "json" };
```
# 3.3.0
[diff](https://github.com/prettier/prettier/compare/3.2.5...3.3.0)
🔗 [Release Notes](https://prettier.io/blog/2024/06/01/3.3.0.html)
# 3.2.5
[diff](https://github.com/prettier/prettier/compare/3.2.4...3.2.5)
#### Support Angular inline styles as single template literal ([#15968](https://github.com/prettier/prettier/pull/15968) by [@sosukesuzuki](https://github.com/sosukesuzuki))
[Angular v17](https://blog.angular.io/introducing-angular-v17-4d7033312e4b) supports single string inline styles.
```ts
// Input
@Component({
template: `
`,
})
export class AppComponent {}
```
#### Use `"json"` parser for `tsconfig.json` by default ([#16012](https://github.com/prettier/prettier/pull/16012) by [@sosukesuzuki](https://github.com/sosukesuzuki))
In [v3.2.0](https://prettier.io/blog/2024/01/12/3.2.0#new-jsonc-parser-added-15831httpsgithubcomprettierprettierpull15831-by-fiskerhttpsgithubcomfisker), we introduced `"jsonc"` parser which adds trailing comma **by default**.
When adding a new parser we also define how it will be used based on the [`linguist-languages`](https://www.npmjs.com/package/linguist-languages) data.
`tsconfig.json` is a special file used by [TypeScript](https://www.typescriptlang.org/docs/handbook/tsconfig-json.html#using-tsconfigjson-or-jsconfigjson), it uses `.json` file extension, but it actually uses the [JSON with Comments](https://code.visualstudio.com/docs/languages/json#_json-with-comments) syntax. However, we found that there are many third-party tools not recognize it correctly because of the confusing `.json` file extension.
We decide to treat it as a JSON file for now to avoid the extra configuration step.
To keep using the `"jsonc"` parser for your `tsconfig.json` files, add the following to your `.prettierrc` file
```json
{
"overrides": [
{
"files": ["tsconfig.json", "jsconfig.json"],
"options": {
"parser": "jsonc"
}
}
]
}
```
```
# Prettier 3.2.4
prettier --file-info tsconfig.json
{ "ignored": false, "inferredParser": "jsonc" }
# Prettier 3.2.5
prettier --file-info tsconfig.json
{ "ignored": false, "inferredParser": "json" }
```
# 3.2.4
[diff](https://github.com/prettier/prettier/compare/3.2.3...3.2.4)
#### Fix incorrect parser inference ([#15947](https://github.com/prettier/prettier/pull/15947) by [@fisker](https://github.com/fisker))
Files like `.eslintrc.json` were incorrectly formatted as JSONC files.
```jsx
// Input
prettier --file-info .eslintrc.json
{ "ignored": false, "inferredParser": "jsonc" }
// Prettier 3.2.4
prettier --file-info .eslintrc.json
{ "ignored": false, "inferredParser": "json" }
```
# 3.2.3
[diff](https://github.com/prettier/prettier/compare/3.2.2...3.2.3)
#### Throw errors for invalid code ([#15881](https://github.com/prettier/prettier/pull/15881) by [@fisker](https://github.com/fisker), [@Josh-Cena](https://github.com/Josh-Cena), [@auvred](https://github.com/auvred))
```ts
// Input
1++;
// Prettier 3.2.2
1++;
// Prettier 3.2.3
SyntaxError: Invalid left-hand side expression in unary operation (1:1)
> 1 | 1++;
| ^
```
```ts
// Input
try {} catch (error = 1){}
// Prettier 3.2.2
try {
} catch (error) {}
// Prettier 3.2.3
SyntaxError: Catch clause variable cannot have an initializer. (1:23)
> 1 | try {} catch (error = 1){}
| ^
```
#### Fix parser inference ([#15927](https://github.com/prettier/prettier/pull/15927) by [@fisker](https://github.com/fisker))
```console
// Prettier 3.2.2
prettier --file-info tsconfig.json
{ "ignored": false, "inferredParser": "json" }
// Prettier 3.2.3
prettier --file-info tsconfig.json
{ "ignored": false, "inferredParser": "jsonc" }
```
# 3.2.2
[diff](https://github.com/prettier/prettier/compare/3.2.1...3.2.2)
#### Fix crash when parsing template literal CSS in a JSX style tag using a spread attribute ([#15896](https://github.com/prettier/prettier/pull/15896) by [@eelco](https://github.com/eelco))
For example this code would crash before:
```jsx
```
#### Fix formatting error on optional call expression and member chain ([#15920](https://github.com/prettier/prettier/pull/15920) by [@sosukesuzuki](https://github.com/sosukesuzuki))
```jsx
// Input
a(() => {}, c?.d());
// Prettier 3.2.1
TypeError: Cannot read properties of undefined (reading 'type')
// Prettier 3.2.2
a(() => {}, c?.d());
```
# 3.2.1
[diff](https://github.com/prettier/prettier/compare/3.2.0...3.2.1)
#### Fix formatting error on member chain ([#15915](https://github.com/prettier/prettier/pull/15915) by [@sosukesuzuki](https://github.com/sosukesuzuki))
```jsx
// Input
test().test2().test2(thing?.something);
// Prettier 3.2.0
TypeError: Cannot read properties of undefined (reading 'type')
// Prettier 3.2.1
test().test2().test2(thing?.something);
```
# 3.2.0
[diff](https://github.com/prettier/prettier/compare/3.1.1...3.2.0)
🔗 [Release Notes](https://prettier.io/blog/2024/01/12/3.2.0.html)
# 3.1.1
[diff](https://github.com/prettier/prettier/compare/3.1.0...3.1.1)
#### Fix config file search ([#15363](https://github.com/prettier/prettier/pull/15363) by [@fisker](https://github.com/fisker))
Previously, we start search for config files from the filePath as a directory, if it happened to be a directory and contains config file, it will be used by mistake.
```text
├─ .prettierrc
└─ test.js (A directory)
└─ .prettierrc
```
```js
// Prettier 3.1.0
await prettier.resolveConfigFile(new URL("./test.js", import.meta.url));
// /test.js/.prettierrc
// Prettier 3.1.1
await prettier.resolveConfigFile(new URL("./test.js", import.meta.url));
// /.prettierrc
```
#### Skip explicitly passed symbolic links with `--no-error-on-unmatched-pattern` ([#15533](https://github.com/prettier/prettier/pull/15533) by [@sanmai-NL](https://github.com/sanmai-NL))
Since Prettier v3, we stopped following symbolic links, however in some use cases, the symbolic link patterns can't be filtered out, and there is no way to prevent Prettier from throwing errors.
In Prettier 3.1.1, you can use `--no-error-on-unmatched-pattern` to simply skip symbolic links.
#### Consistently use tabs in ternaries when `useTabs` is `true` ([#15662](https://github.com/prettier/prettier/pull/15662) by [@auvred](https://github.com/auvred))
```jsx
// Input
aaaaaaaaaaaaaaa
? bbbbbbbbbbbbbbbbbb
: ccccccccccccccc
? ddddddddddddddd
: eeeeeeeeeeeeeee
? fffffffffffffff
: gggggggggggggggg;
// Prettier 3.1.0
aaaaaaaaaaaaaaa
? bbbbbbbbbbbbbbbbbb
: ccccccccccccccc
? ddddddddddddddd
: eeeeeeeeeeeeeee
? fffffffffffffff
: gggggggggggggggg;
// Prettier 3.1.1
aaaaaaaaaaaaaaa
? bbbbbbbbbbbbbbbbbb
: ccccccccccccccc
? ddddddddddddddd
: eeeeeeeeeeeeeee
? fffffffffffffff
: gggggggggggggggg;
```
#### Improve config file search ([#15663](https://github.com/prettier/prettier/pull/15663) by [@fisker](https://github.com/fisker))
The Prettier config file search performance has been improved by more effective cache strategy.
#### Fix unstable and ugly formatting for comments in destructuring patterns ([#15708](https://github.com/prettier/prettier/pull/15708) by [@sosukesuzuki](https://github.com/sosukesuzuki))
```tsx
// Input
const {
foo,
// bar
// baz
}: Foo = expr;
// Prettier 3.1.0
const {
foo1,
} // bar
// baz
: Foo = expr;
// Prettier 3.1.0 second output
const {
foo1, // bar
} // baz
: Foo = expr;
// Prettier 3.1.1
const {
foo1,
// bar
// baz
}: Foo = expr;
```
#### Support "Import Attributes" ([#15718](https://github.com/prettier/prettier/pull/15718) by [@fisker](https://github.com/fisker))
[TypeScript 5.3](https://devblogs.microsoft.com/typescript/announcing-typescript-5-3/#import-attributes) supports the latest updates to the [import attributes](https://github.com/tc39/proposal-import-attributes) proposal.
```tsx
import something from "./something.json" with { type: "json" };
```
#### Fix false claim in docs that cursorOffset is incompatible with rangeStart/rangeEnd ([#15750](https://github.com/prettier/prettier/pull/15750) by [@ExplodingCabbage](https://github.com/ExplodingCabbage))
The cursorOffset option has in fact been compatible with rangeStart/rangeEnd for over 5 years, thanks to work by @ds300. However, Prettier's documentation (including the CLI `--help` text) continued to claim otherwise, falsely. The documentation is now fixed.
#### Keep curly braces and `from` keyword in empty `import` statements ([#15756](https://github.com/prettier/prettier/pull/15756) by [@fisker](https://github.com/fisker))
```js
// Input
import { } from 'foo';
import { /* comment */ } from 'bar';
// Prettier 3.1.0
import {} from "foo";
import /* comment */ "bar";
// Prettier 3.1.1
import {} from "foo";
import {} from /* comment */ "bar";
```
#### Keep empty import attributes and assertions ([#15757](https://github.com/prettier/prettier/pull/15757) by [@fisker](https://github.com/fisker))
```js
// Input
import foo from "foo" with {};
import bar from "bar" assert {};
// Prettier 3.1.0
import foo from "foo";
import bar from "bar";
// Prettier 3.1.1
import foo from "foo" with {};
import bar from "bar" assert {};
```
# 3.1.0
[diff](https://github.com/prettier/prettier/compare/3.0.3...3.1.0)
🔗 [Release Notes](https://prettier.io/blog/2023/11/13/3.1.0.html)
# 3.0.3
[diff](https://github.com/prettier/prettier/compare/3.0.2...3.0.3)
#### Add `preferUnplugged: true` to `package.json` ([#15169](https://github.com/prettier/prettier/pull/15169) by [@fisker](https://github.com/fisker) and [@so1ve](https://github.com/so1ve))
Prettier v3 uses dynamic imports, user [will need to unplug Prettier](https://github.com/yarnpkg/berry/pull/5411#issuecomment-1523502224) when Yarn's PnP mode is enabled, add [`preferUnplugged: true`](https://yarnpkg.com/configuration/manifest#preferUnplugged) to `package.json`, so Yarn will install Prettier as unplug by default.
#### Support shared config that forbids `require()` ([#15233](https://github.com/prettier/prettier/pull/15233) by [@fisker](https://github.com/fisker))
If an external shared config package is used, and the package `exports` don't have `require` or `default` export.
In Prettier 3.0.2 Prettier fails when attempt to `require()` the package, and throws an error.
```text
Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: No "exports" main defined in /package.json
```
#### Allow argument of `require()` to break ([#15256](https://github.com/prettier/prettier/pull/15256) by [@fisker](https://github.com/fisker))
```jsx
// Input
const plugin = require(
global.STANDALONE
? path.join(__dirname, "../standalone.js")
: path.join(__dirname, "..")
);
// Prettier 3.0.2
const plugin = require(global.STANDALONE
? path.join(__dirname, "../standalone.js")
: path.join(__dirname, ".."));
// Prettier 3.0.3
const plugin = require(
global.STANDALONE
? path.join(__dirname, "../standalone.js")
: path.join(__dirname, "..")
);
```
#### Do not print trailing commas in arrow function type parameter lists in `ts` code blocks ([#15286](https://github.com/prettier/prettier/pull/15286) by [@sosukesuzuki](https://github.com/sosukesuzuki))
````md
```ts
const foo = () => {}
```
```ts
const foo = () => {}
```
```ts
const foo = () => {}
```
````
#### Support TypeScript 5.2 `using` / `await using` declaration ([#15321](https://github.com/prettier/prettier/pull/15321) by [@sosukesuzuki](https://github.com/sosukesuzuki))
Support for the upcoming Explicit Resource Management feature in ECMAScript. [`using` / `await using` declaration](https://devblogs.microsoft.com/typescript/announcing-typescript-5-2/#using-declarations-and-explicit-resource-management)
```tsx
{
using foo = new Foo();
await using bar = new Bar();
}
```
# 3.0.2
[diff](https://github.com/prettier/prettier/compare/3.0.1...3.0.2)
#### Break after `=` of assignment if RHS is poorly breakable AwaitExpression or YieldExpression ([#15204](https://github.com/prettier/prettier/pull/15204) by [@seiyab](https://github.com/seiyab))
```js
// Input
const { section, rubric, authors, tags } = await utils.upsertCommonData(mainData);
// Prettier 3.0.1
const { section, rubric, authors, tags } = await utils.upsertCommonData(
mainData,
);
// Prettier 3.0.2
const { section, rubric, authors, tags } =
await utils.upsertCommonData(mainData);
```
#### Do not add trailing comma for grouped scss comments ([#15217](https://github.com/prettier/prettier/pull/15217) by [@auvred](https://github.com/auvred))
```scss
/* Input */
$foo: (
'property': (),
// comment 1
// comment 2
)
/* Prettier 3.0.1 */
$foo: (
"property": (),
// comment 1
// comment 2,
);
/* Prettier 3.0.2 */
$foo: (
"property": (),
// comment 1
// comment 2
);
```
#### Print `declare` and `export` keywords for nested namespace ([#15249](https://github.com/prettier/prettier/pull/15249) by [@sosukesuzuki](https://github.com/sosukesuzuki))
```tsx
// Input
declare namespace abc1.def {}
export namespace abc2.def {}
// Prettier 3.0.1
namespace abc1.def {}
namespace abc2.def {}
// Prettier 3.0.2
declare namespace abc1.def {}
export namespace abc2.def {}
```
# 3.0.1
[diff](https://github.com/prettier/prettier/compare/3.0.0...3.0.1)
#### Fix cursor positioning for a special case ([#14812](https://github.com/prettier/prettier/pull/14812) by [@fisker](https://github.com/fisker))
```js
// <|> is the cursor position
/* Input */
// All messages are represented in JSON.
// So, the prettier.py controls a subprocess which spawns "node {this_file}".
import {<|> } from "fs"
/* Prettier 3.0.0 */
// All messages are represented in JSON.
// So, the prettier.py <|>controls a subprocess which spawns "node {this_file}".
import {} from "fs"
/* Prettier 3.0.1 */
// All messages are represented in JSON.
// So, the prettier.py controls a subprocess which spawns "node {this_file}".
import {<|>} from "fs"
```
#### Fix plugins/estree.d.ts to make it a module ([#15018](https://github.com/prettier/prettier/pull/15018) by [@kingyue737](https://github.com/kingyue737))
Add `export {}` in `plugins/estree.d.ts` to fix the "File is not a module" error
#### Add parenthesis around leading multiline comment in return statement ([#15037](https://github.com/prettier/prettier/pull/15037) by [@auvred](https://github.com/auvred))
```jsx
// Input
function fn() {
return (
/**
* @type {...}
*/ expression
)
}
// Prettier 3.0.0
function fn() {
return /**
* @type {...}
*/ expression;
}
// Prettier 3.0.1
function fn() {
return (
/**
* @type {...}
*/ expression
);
}
```
#### Add support for Vue "Generic Components" ([#15066](https://github.com/prettier/prettier/pull/15066) by [@auvred](https://github.com/auvred))
https://blog.vuejs.org/posts/vue-3-3#generic-components
```vue
```
#### Fix comments print in `IfStatement` ([#15076](https://github.com/prettier/prettier/pull/15076) by [@fisker](https://github.com/fisker))
```js
function a(b) {
if (b) return 1; // comment
else return 2;
}
/* Prettier 3.0.0 */
Error: Comment "comment" was not printed. Please report this error!
/* Prettier 3.0.1 */
function a(b) {
if (b) return 1; // comment
else return 2;
}
```
#### Add missing type definition for `printer.preprocess` ([#15123](https://github.com/prettier/prettier/pull/15123) by [@so1ve](https://github.com/so1ve))
```diff
export interface Printer {
// ...
+ preprocess?:
+ | ((ast: T, options: ParserOptions) => T | Promise)
+ | undefined;
}
```
#### Add missing `getVisitorKeys` method type definition for `Printer` ([#15125](https://github.com/prettier/prettier/pull/15125) by [@auvred](https://github.com/auvred))
```tsx
const printer: Printer = {
print: () => [],
getVisitorKeys(node, nonTraversableKeys) {
return ["body"];
},
};
```
#### Add typing to support `readonly` array properties of AST Node ([#15127](https://github.com/prettier/prettier/pull/15127) by [@auvred](https://github.com/auvred))
```tsx
// Input
interface TestNode {
readonlyArray: readonly string[];
}
declare const path: AstPath;
path.map(() => "", "readonlyArray");
// Prettier 3.0.0
interface TestNode {
readonlyArray: readonly string[];
}
declare const path: AstPath;
path.map(() => "", "readonlyArray");
// ^ Argument of type '"readonlyArray"' is not assignable to parameter of type '"regularArray"'. ts(2345)
// Prettier 3.0.1
interface TestNode {
readonlyArray: readonly string[];
}
declare const path: AstPath;
path.map(() => "", "readonlyArray");
```
#### Add space before unary minus followed by a function call ([#15129](https://github.com/prettier/prettier/pull/15129) by [@pamelalozano](https://github.com/pamelalozano))
```less
// Input
div {
margin: - func();
}
// Prettier 3.0.0
div {
margin: -func();
}
// Prettier 3.0.1
div {
margin: - func();
}
```
# 3.0.0
[diff](https://github.com/prettier/prettier/compare/3.0.0-alpha.6...3.0.0)
🔗 [Release Notes](https://prettier.io/blog/2023/07/05/3.0.0.html)
# 2.8.8
This version is a republished version of v2.8.7.
A bad version was accidentally published and [it can't be unpublished](https://github.com/npm/cli/issues/1686), apologies for the churn.
# 2.8.7
[diff](https://github.com/prettier/prettier/compare/2.8.6...2.8.7)
#### Allow multiple decorators on same getter/setter ([#14584](https://github.com/prettier/prettier/pull/14584) by [@fisker](https://github.com/fisker))
```ts
// Input
class A {
@decorator()
get foo () {}
@decorator()
set foo (value) {}
}
// Prettier 2.8.6
SyntaxError: Decorators cannot be applied to multiple get/set accessors of the same name. (5:3)
3 | get foo () {}
4 |
> 5 | @decorator()
| ^^^^^^^^^^^^
6 | set foo (value) {}
7 | }
// Prettier 2.8.7
class A {
@decorator()
get foo() {}
@decorator()
set foo(value) {}
}
```
# 2.8.6
[diff](https://github.com/prettier/prettier/compare/2.8.5...2.8.6)
#### Allow decorators on private members and class expressions ([#14548](https://github.com/prettier/prettier/pull/14548) by [@fisker](https://github.com/fisker))
```ts
// Input
class A {
@decorator()
#privateMethod () {}
}
// Prettier 2.8.5
SyntaxError: Decorators are not valid here. (2:3)
1 | class A {
> 2 | @decorator()
| ^^^^^^^^^^^^
3 | #privateMethod () {}
4 | }
// Prettier 2.8.6
class A {
@decorator()
#privateMethod() {}
}
```
# 2.8.5
[diff](https://github.com/prettier/prettier/compare/2.8.4...2.8.5)
#### Support TypeScript 5.0 ([#14391](https://github.com/prettier/prettier/pull/14391) by [@fisker](https://github.com/fisker), [#13819](https://github.com/prettier/prettier/pull/13819) by [@fisker](https://github.com/fisker), [@sosukesuzuki](https://github.com/sosukesuzuki))
TypeScript 5.0 introduces two new syntactic features:
- `const` modifiers for type parameters
- `export type *` declarations
#### Add missing parentheses for decorator ([#14393](https://github.com/prettier/prettier/pull/14393) by [@fisker](https://github.com/fisker))
```jsx
// Input
class Person {
@(myDecoratorArray[0])
greet() {}
}
// Prettier 2.8.4
class Person {
@myDecoratorArray[0]
greet() {}
}
// Prettier 2.8.5
class Person {
@(myDecoratorArray[0])
greet() {}
}
```
#### Add parentheses for `TypeofTypeAnnotation` to improve readability ([#14458](https://github.com/prettier/prettier/pull/14458) by [@fisker](https://github.com/fisker))
```tsx
// Input
type A = (typeof node.children)[];
// Prettier 2.8.4
type A = typeof node.children[];
// Prettier 2.8.5
type A = (typeof node.children)[];
```
#### Support `max_line_length=off` when parsing `.editorconfig` ([#14516](https://github.com/prettier/prettier/pull/14516) by [@josephfrazier](https://github.com/josephfrazier))
If an .editorconfig file is in your project and it sets `max_line_length=off` for the file you're formatting,
it will be interpreted as a `printWidth` of `Infinity` rather than being ignored
(which previously resulted in the default `printWidth` of 80 being applied, if not overridden by Prettier-specific configuration).
```html
;
;
```
# 2.8.4
[diff](https://github.com/prettier/prettier/compare/2.8.3...2.8.4)
#### Fix leading comments in mapped types with `readonly` ([#13427](https://github.com/prettier/prettier/pull/13427) by [@thorn0](https://github.com/thorn0), [@sosukesuzuki](https://github.com/sosukesuzuki))
```tsx
// Input
type Type = {
// comment
readonly [key in Foo];
};
// Prettier 2.8.3
type Type = {
readonly // comment
[key in Foo];
};
// Prettier 2.8.4
type Type = {
// comment
readonly [key in Foo];
};
```
#### Group params in opening block statements ([#14067](https://github.com/prettier/prettier/pull/14067) by [@jamescdavis](https://github.com/jamescdavis))
This is a follow-up to #13930 to establish wrapping consistency between opening block statements and else blocks by
grouping params in opening blocks. This causes params to break to a new line together and not be split across lines
unless the length of params exceeds the print width. This also updates the else block wrapping to behave exactly the
same as opening blocks.
```hbs
{{! Input }}
{{#block param param param param param param param param param param as |blockParam|}}
Hello
{{else block param param param param param param param param param param as |blockParam|}}
There
{{/block}}
{{! Prettier 2.8.3 }}
{{#block
param
param
param
param
param
param
param
param
param
param
as |blockParam|
}}
Hello
{{else block param
param
param
param
param
param
param
param
param
param}}
There
{{/block}}
{{! Prettier 2.8.4 }}
{{#block
param param param param param param param param param param
as |blockParam|
}}
Hello
{{else block
param param param param param param param param param param
as |blockParam|
}}
There
{{/block}}
```
#### Ignore files in `.sl/` ([#14206](https://github.com/prettier/prettier/pull/14206) by [@bolinfest](https://github.com/bolinfest))
In [Sapling SCM](https://sapling-scm.com/), `.sl/` is the folder where it stores its state, analogous to `.git/` in Git. It should be ignored in Prettier like the other SCM folders.
#### Recognize `@satisfies` in Closure-style type casts ([#14262](https://github.com/prettier/prettier/pull/14262) by [@fisker](https://github.com/fisker))
```jsx
// Input
const a = /** @satisfies {Record} */ ({hello: 1337});
const b = /** @type {Record} */ ({hello: 1337});
// Prettier 2.8.3
const a = /** @satisfies {Record} */ { hello: 1337 };
const b = /** @type {Record} */ ({ hello: 1337 });
// Prettier 2.8.4
const a = /** @satisfies {Record} */ ({hello: 1337});
const b = /** @type {Record} */ ({hello: 1337});
```
#### Fix parens in inferred function return types with `extends` ([#14279](https://github.com/prettier/prettier/pull/14279) by [@fisker](https://github.com/fisker))
```ts
// Input
type Foo = T extends ((a) => a is infer R extends string) ? R : never;
// Prettier 2.8.3 (First format)
type Foo = T extends (a) => a is infer R extends string ? R : never;
// Prettier 2.8.3 (Second format)
SyntaxError: '?' expected.
// Prettier 2.8.4
type Foo = T extends ((a) => a is infer R extends string) ? R : never;
```
# 2.8.3
[diff](https://github.com/prettier/prettier/compare/2.8.2...2.8.3)
#### Allow self-closing tags on custom elements ([#14170](https://github.com/prettier/prettier/pull/14170) by [@fisker](https://github.com/fisker))
See [Angular v15.1.0 release note](https://github.com/angular/angular/releases/tag/15.1.0) for details.
```html
// Input
// Prettier 2.8.2
SyntaxError: Only void and foreign elements can be self closed "app-test" (1:1)
> 1 |
| ^^^^^^^^^
2 |
// Prettier 2.8.3
```
# 2.8.2
[diff](https://github.com/prettier/prettier/compare/2.8.1...2.8.2)
#### Don't lowercase link references ([#13155](https://github.com/prettier/prettier/pull/13155) by [@DerekNonGeneric](https://github.com/DerekNonGeneric) & [@fisker](https://github.com/fisker))
```markdown
We now don't strictly follow the release notes format suggested by [Keep a Changelog].
[Keep a Changelog]: https://example.com/
We now don't strictly follow the release notes format suggested by [Keep a Changelog].
[keep a changelog]: https://example.com/
```
#### Preserve self-closing tags ([#13691](https://github.com/prettier/prettier/pull/13691) by [@dcyriller](https://github.com/dcyriller))
```hbs
{{! Input }}
{{! Prettier 2.8.1 }}
{{! Prettier 2.8.2 }}
```
#### Allow custom "else if"-like blocks with block params ([#13930](https://github.com/prettier/prettier/pull/13930) by [@jamescdavis](https://github.com/jamescdavis))
#13507 added support for custom block keywords used with `else`, but failed to allow block params. This updates printer-glimmer to allow block params with custom "else if"-like blocks.
```hbs
{{! Input }}
{{#when isAtWork as |work|}}
Ship that
{{work}}!
{{else when isReading as |book|}}
You can finish
{{book}}
eventually...
{{else}}
Go to bed!
{{/when}}
{{! Prettier 2.8.1 }}
{{#when isAtWork as |work|}}
Ship that
{{work}}!
{{else when isReading}}
You can finish
{{book}}
eventually...
{{else}}
Go to bed!
{{/when}}
{{! Prettier 2.8.2 }}
{{#when isAtWork as |work|}}
Ship that
{{work}}!
{{else when isReading as |book|}}
You can finish
{{book}}
eventually...
{{else}}
Go to bed!
{{/when}}
```
#### Preserve empty lines between nested SCSS maps ([#13931](https://github.com/prettier/prettier/pull/13931) by [@jneander](https://github.com/jneander))
```scss
/* Input */
$map: (
'one': (
'key': 'value',
),
'two': (
'key': 'value',
),
)
/* Prettier 2.8.1 */
$map: (
'one': (
'key': 'value',
),
'two': (
'key': 'value',
),
)
/* Prettier 2.8.2 */
$map: (
'one': (
'key': 'value',
),
'two': (
'key': 'value',
),
)
```
#### Fix missing parentheses when an expression statement starts with `let[` ([#14000](https://github.com/prettier/prettier/pull/14000), [#14044](https://github.com/prettier/prettier/pull/14044) by [@fisker](https://github.com/fisker), [@thorn0](https://github.com/thorn0))
```jsx
// Input
(let[0] = 2);
// Prettier 2.8.1
let[0] = 2;
// Prettier 2.8.1 (second format)
SyntaxError: Unexpected token (1:5)
> 1 | let[0] = 2;
| ^
2 |
// Prettier 2.8.2
(let)[0] = 2;
```
#### Fix semicolon duplicated at the end of LESS file ([#14007](https://github.com/prettier/prettier/pull/14007) by [@mvorisek](https://github.com/mvorisek))
```less
// Input
@variable: {
field: something;
};
// Prettier 2.8.1
@variable: {
field: something;
}; ;
// Prettier 2.8.2
@variable: {
field: something;
};
```
#### Fix no space after unary minus when followed by opening parenthesis in LESS ([#14008](https://github.com/prettier/prettier/pull/14008) by [@mvorisek](https://github.com/mvorisek))
```less
// Input
.unary_minus_single {
margin: -(@a);
}
.unary_minus_multi {
margin: 0 -(@a);
}
.binary_minus {
margin: 0 - (@a);
}
// Prettier 2.8.1
.unary_minus_single {
margin: - (@a);
}
.unary_minus_multi {
margin: 0 - (@a);
}
.binary_minus {
margin: 0 - (@a);
}
// Prettier 2.8.2
.unary_minus_single {
margin: -(@a);
}
.unary_minus_multi {
margin: 0 -(@a);
}
.binary_minus {
margin: 0 - (@a);
}
```
#### Do not change case of property name if inside a variable declaration in LESS ([#14034](https://github.com/prettier/prettier/pull/14034) by [@mvorisek](https://github.com/mvorisek))
```less
// Input
@var: {
preserveCase: 0;
};
// Prettier 2.8.1
@var: {
preservecase: 0;
};
// Prettier 2.8.2
@var: {
preserveCase: 0;
};
```
#### Fix formatting for auto-accessors with comments ([#14038](https://github.com/prettier/prettier/pull/14038) by [@fisker](https://github.com/fisker))
```jsx
// Input
class A {
@dec()
// comment
accessor b;
}
// Prettier 2.8.1
class A {
@dec()
accessor // comment
b;
}
// Prettier 2.8.1 (second format)
class A {
@dec()
accessor; // comment
b;
}
// Prettier 2.8.2
class A {
@dec()
// comment
accessor b;
}
```
#### Add parentheses for TSTypeQuery to improve readability ([#14042](https://github.com/prettier/prettier/pull/14042) by [@onishi-kohei](https://github.com/onishi-kohei))
```tsx
// Input
a as (typeof node.children)[number]
a as (typeof node.children)[]
a as ((typeof node.children)[number])[]
// Prettier 2.8.1
a as typeof node.children[number];
a as typeof node.children[];
a as typeof node.children[number][];
// Prettier 2.8.2
a as (typeof node.children)[number];
a as (typeof node.children)[];
a as (typeof node.children)[number][];
```
#### Fix displacing of comments in default switch case ([#14047](https://github.com/prettier/prettier/pull/14047) by [@thorn0](https://github.com/thorn0))
It was a regression in Prettier 2.6.0.
```jsx
// Input
switch (state) {
default:
result = state; // no change
break;
}
// Prettier 2.8.1
switch (state) {
default: // no change
result = state;
break;
}
// Prettier 2.8.2
switch (state) {
default:
result = state; // no change
break;
}
```
#### Support type annotations on auto accessors via `babel-ts` ([#14049](https://github.com/prettier/prettier/pull/14049) by [@sosukesuzuki](https://github.com/sosukesuzuki))
[The bug that `@babel/parser` cannot parse auto accessors with type annotations](https://github.com/babel/babel/issues/15205) has been fixed. So we now support it via `babel-ts` parser.
```tsx
class Foo {
accessor prop: number;
}
```
#### Fix formatting of empty type parameters ([#14073](https://github.com/prettier/prettier/pull/14073) by [@fisker](https://github.com/fisker))
```jsx
// Input
const foo: bar* comment */> = () => baz;
// Prettier 2.8.1
Error: Comment "comment" was not printed. Please report this error!
// Prettier 2.8.2
const foo: bar* comment */> = () => baz;
```
#### Add parentheses to head of `ExpressionStatement` instead of the whole statement ([#14077](https://github.com/prettier/prettier/pull/14077) by [@fisker](https://github.com/fisker))
```jsx
// Input
({}).toString.call(foo) === "[object Array]"
? foo.forEach(iterateArray)
: iterateObject(foo);
// Prettier 2.8.1
({}.toString.call(foo) === "[object Array]"
? foo.forEach(iterateArray)
: iterateObject(foo));
// Prettier 2.8.2
({}).toString.call(foo.forEach) === "[object Array]"
? foo.forEach(iterateArray)
: iterateObject(foo);
```
#### Fix comments after directive ([#14081](https://github.com/prettier/prettier/pull/14081) by [@fisker](https://github.com/fisker))
```jsx
// Input
"use strict" /* comment */;
// Prettier 2.8.1 (with other js parsers except `babel`)
Error: Comment "comment" was not printed. Please report this error!
// Prettier 2.8.2
```
#### Fix formatting for comments inside JSX attribute ([#14082](https://github.com/prettier/prettier/pull/14082) by [@fisker](https://github.com/fisker))
```jsx
// Input
function MyFunctionComponent() {
}
// Prettier 2.8.1
Error: Comment "old" was not printed. Please report this error!
// Prettier 2.8.2
function MyFunctionComponent() {
;
}
```
#### Quote numeric keys for json-stringify parser ([#14083](https://github.com/prettier/prettier/pull/14083) by [@fisker](https://github.com/fisker))
```jsx
// Input
{0: 'value'}
// Prettier 2.8.1
{
0: "value"
}
// Prettier 2.8.2
{
"0": "value"
}
```
#### Fix removing commas from function arguments in maps ([#14089](https://github.com/prettier/prettier/pull/14089) by [@sosukesuzuki](https://github.com/sosukesuzuki))
```scss
/* Input */
$foo: map-fn(
(
"#{prop}": inner-fn($first, $second),
)
);
/* Prettier 2.8.1 */
$foo: map-fn(("#{prop}": inner-fn($first $second)));
/* Prettier 2.8.2 */
$foo: map-fn(
(
"#{prop}": inner-fn($first, $second),
)
);
```
#### Do not insert space in LESS property access ([#14103](https://github.com/prettier/prettier/pull/14103) by [@fisker](https://github.com/fisker))
```less
// Input
a {
color: @colors[@white];
}
// Prettier 2.8.1
a {
color: @colors[ @white];
}
// Prettier 2.8.2
```
# 2.8.1
[diff](https://github.com/prettier/prettier/compare/2.8.0...2.8.1)
#### Fix SCSS map in arguments ([#9184](https://github.com/prettier/prettier/pull/9184) by [@agamkrbit](https://github.com/agamkrbit))
```scss
// Input
$display-breakpoints: map-deep-merge(
(
"print-only": "only print",
"screen-only": "only screen",
"xs-only": "only screen and (max-width: #{map-get($grid-breakpoints, "sm")-1})",
),
$display-breakpoints
);
// Prettier 2.8.0
$display-breakpoints: map-deep-merge(
(
"print-only": "only print",
"screen-only": "only screen",
"xs-only": "only screen and (max-width: #{map-get($grid-breakpoints, " sm
")-1})",
),
$display-breakpoints
);
// Prettier 2.8.1
$display-breakpoints: map-deep-merge(
(
"print-only": "only print",
"screen-only": "only screen",
"xs-only": "only screen and (max-width: #{map-get($grid-breakpoints, "sm")-1})",
),
$display-breakpoints
);
```
#### Support auto accessors syntax ([#13919](https://github.com/prettier/prettier/pull/13919) by [@sosukesuzuki](https://github.com/sosukesuzuki))
Support for [Auto Accessors Syntax](https://devblogs.microsoft.com/typescript/announcing-typescript-4-9/#auto-accessors-in-classes) landed in TypeScript 4.9.
(Doesn't work well with `babel-ts` parser)
```tsx
class Foo {
accessor foo: number = 3;
}
```
# 2.8.0
[diff](https://github.com/prettier/prettier/compare/2.7.1...2.8.0)
🔗 [Release Notes](https://prettier.io/blog/2022/11/23/2.8.0.html)
# 2.7.1
[diff](https://github.com/prettier/prettier/compare/2.7.0...2.7.1)
#### Keep useful empty lines in description ([#13013](https://github.com/prettier/prettier/pull/13013) by [@chimurai](https://github.com/chimurai))
```graphql
# Input
"""
First line
Second Line
"""
type Person {
name: String
}
# Prettier 2.7.0
"""
First line
Second Line
"""
type Person {
name: String
}
# Prettier 2.7.1
"""
First line
Second Line
"""
type Person {
name: String
}
```
# 2.7.0
[diff](https://github.com/prettier/prettier/compare/2.6.2...2.7.0)
🔗 [Release Notes](https://prettier.io/blog/2022/06/14/2.7.0.html)
# 2.6.2
[diff](https://github.com/prettier/prettier/compare/2.6.1...2.6.2)
#### Fix LESS/SCSS format error ([#12536](https://github.com/prettier/prettier/pull/12536) by [@fisker](https://github.com/fisker))
```less
// Input
.background-gradient(@cut) {
background: linear-gradient(
to right,
@white 0%,
@white (@cut - 0.01%),
@portal-background @cut,
@portal-background 100%
);
}
// Prettier 2.6.1
TypeError: Cannot read properties of undefined (reading 'endOffset')
// Prettier 2.6.2
.background-gradient(@cut) {
background: linear-gradient(
to right,
@white 0%,
@white (@cut - 0.01%),
@portal-background @cut,
@portal-background 100%
);
}
```
#### Update `meriyah` to fix several bugs ([#12567](https://github.com/prettier/prettier/pull/12567) by [@fisker](https://github.com/fisker), fixes in [`meriyah`](https://github.com/meriyah/meriyah/) by [@3cp](https://github.com/3cp))
Fixes bugs when parsing following valid code:
```js
foo(await bar());
```
```js
const regex = /.*/ms;
```
```js
const element =
{/w/.test(s)}
;
```
```js
class A extends B {
#privateMethod() {
super.method();
}
}
```
# 2.6.1
[diff](https://github.com/prettier/prettier/compare/2.6.0...2.6.1)
#### Ignore `loglevel` when printing information ([#12477](https://github.com/prettier/prettier/pull/12477) by [@fisker](https://github.com/fisker))
```bash
# Prettier 2.6.0
prettier --loglevel silent --find-config-path index.js
# Nothing printed
# Prettier 2.6.1
prettier --loglevel silent --help no-color
# .prettierrc
```
#### Make artifact friendly for webpack ([#12485](https://github.com/prettier/prettier/pull/12485), [#12511](https://github.com/prettier/prettier/pull/12511) by [@fisker](https://github.com/fisker))
Fixes two problems when bundling our UMD files with webpack:
- A error ``"`....__exportStar` is not a function"`` throws when running the bundles.
- Some files cause warning about `"Critical dependency: the request of a dependency is an expression"`.
#### Fix non-idempotent formatting of function calls with complex type arguments ([#12508](https://github.com/prettier/prettier/pull/12508) by [@sosukesuzuki](https://github.com/sosukesuzuki))
```tsx
// Input
const foo =
doSomething<{ foo1: "foo1", foo2: "foo2", foo3: "foo3", foo4: "foo4", foo5: "foo5" }>();
// Prettier 2.6.0 (first)
const foo =
doSomething<{
foo1: "foo1";
foo2: "foo2";
foo3: "foo3";
foo4: "foo4";
foo5: "foo5";
}>();
// Prettier 2.6.0 (second)
const foo = doSomething<{
foo1: "foo1";
foo2: "foo2";
foo3: "foo3";
foo4: "foo4";
foo5: "foo5";
}>();
// Prettier 2.6.1
const foo = doSomething<{
foo1: "foo1";
foo2: "foo2";
foo3: "foo3";
foo4: "foo4";
foo5: "foo5";
}>();
```
#### Fix minimist security issue ([#12513](https://github.com/prettier/prettier/pull/12513) by [@dependabot](https://github.com/dependabot))
Details: [Prototype Pollution](https://security.snyk.io/vuln/SNYK-JS-MINIMIST-559764)
# 2.6.0
[diff](https://github.com/prettier/prettier/compare/2.5.1...2.6.0)
🔗 [Release Notes](https://prettier.io/blog/2022/03/16/2.6.0.html)
# 2.5.1
[diff](https://github.com/prettier/prettier/compare/2.5.0...2.5.1)
#### Improve formatting for empty tuple types ([#11884](https://github.com/prettier/prettier/pull/11884) by [@sosukesuzuki](https://github.com/sosukesuzuki))
```tsx
// Input
type Foo =
Foooooooooooooooooooooooooooooooooooooooooooooooooooooooooo extends []
? Foo3
: Foo4;
// Prettier 2.5.0
type Foo = Foooooooooooooooooooooooooooooooooooooooooooooooooooooooooo extends [
]
? Foo3
: Foo4;
// Prettier 2.5.0 (tailingCommma = all)
// Invalid TypeScript code
type Foo = Foooooooooooooooooooooooooooooooooooooooooooooooooooooooooo extends [
,
]
? Foo3
: Foo4;
// Prettier 2.5.1
type Foo =
Foooooooooooooooooooooooooooooooooooooooooooooooooooooooooo extends []
? Foo3
: Foo4;
```
#### Fix compatibility with Jest inline snapshot test ([#11892](https://github.com/prettier/prettier/pull/11892) by [@fisker](https://github.com/fisker))
A internal change in [email protected] accidentally breaks the Jest inline snapshot test.
#### Support Glimmer's named blocks ([#11899](https://github.com/prettier/prettier/pull/11899) by [@duailibe](https://github.com/duailibe))
Prettier already supported this feature, but it converted empty named blocks to self-closing, which is not supported by the Glimmer compiler.
See: [Glimmer's named blocks](https://emberjs.github.io/rfcs/0460-yieldable-named-blocks.html).
```hbs
// Input
<:named>
// Prettier 2.5.0
<:named />
// Prettier 2.5.1
<:named>
```
# 2.5.0
[diff](https://github.com/prettier/prettier/compare/2.4.1...2.5.0)
🔗 [Release Notes](https://prettier.io/blog/2021/11/25/2.5.0.html)
# 2.4.1
[diff](https://github.com/prettier/prettier/compare/2.4.0...2.4.1)
#### Fix wildcard syntax in `@forward` ([#11482](https://github.com/prettier/prettier/pull/11482)) ([#11487](https://github.com/prettier/prettier/pull/11487) by [@niksy](https://github.com/niksy))
```scss
// Input
@forward "library" as btn-*;
// Prettier 2.4.0
@forward "library" as btn- *;
// Prettier 2.4.1
@forward "library" as btn-*;
```
#### Add new CLI option `debug-print-ast` ([#11514](https://github.com/prettier/prettier/pull/11514) by [@sosukesuzuki](https://github.com/sosukesuzuki))
A new `--debug-print-ast` CLI flag for debugging.
# 2.4.0
[diff](https://github.com/prettier/prettier/compare/2.3.2...2.4.0)
🔗 [Release Notes](https://prettier.io/blog/2021/09/09/2.4.0.html)
# 2.3.2
[diff](https://github.com/prettier/prettier/compare/2.3.1...2.3.2)
#### Fix failure on dir with trailing slash ([#11000](https://github.com/prettier/prettier/pull/11000) by [@fisker](https://github.com/fisker))
```console
$ ls
1.js 1.unknown
# Prettier 2.3.1
$ prettier . -l
1.js
$ prettier ./ -l
[error] No supported files were found in the directory: "./".
# Prettier 2.3.2
$ prettier ./ -l
1.js
```
#### Fix handling of parenthesis with Flow's {Optional}IndexedAccess ([#11051](https://github.com/prettier/prettier/pull/11051) by [@gkz](https://github.com/gkz))
Add parens when required.
```jsx
// Input
type A = (T & S)['bar'];
type B = (T | S)['bar'];
type C = (?T)['bar'];
type D = (typeof x)['bar'];
type E = (string => void)['bar'];
// Prettier 2.3.1
type A = T & S["bar"];
type B = T | S["bar"];
type C = ?T["bar"];
type D = typeof x["bar"];
type E = (string) => void["bar"];
// Prettier 2.3.2
type A = (T & S)["bar"];
type B = (T | S)["bar"];
type C = (?T)["bar"];
type D = (typeof x)["bar"];
type E = ((string) => void)["bar"];
```
#### Print override modifiers for parameter property ([#11074](https://github.com/prettier/prettier/pull/11074) by [@sosukesuzuki](https://github.com/sosukesuzuki))
```ts
// Input
class D extends B {
constructor(override foo: string) {
super();
}
}
// Prettier 2.3.1
class D extends B {
constructor(foo: string) {
super();
}
}
// Prettier 2.3.2
class D extends B {
constructor(override foo: string) {
super();
}
}
```
# 2.3.1
[diff](https://github.com/prettier/prettier/compare/2.3.0...2.3.1)
#### Support TypeScript 4.3 ([#10945](https://github.com/prettier/prettier/pull/10945) by [@sosukesuzuki](https://github.com/sosukesuzuki))
##### [`override` modifiers in class elements](https://devblogs.microsoft.com/typescript/announcing-typescript-4-3/#override)
```ts
class Foo extends {
override method() {}
}
```
##### [static index signatures (`[key: KeyType]: ValueType`) in classes](https://devblogs.microsoft.com/typescript/announcing-typescript-4-3/#static-index-signatures)
```ts
class Foo {
static [key: string]: Bar;
}
```
##### [`get` / `set` in type declarations](https://devblogs.microsoft.com/typescript/announcing-typescript-4-3/#separate-write-types)
```ts
interface Foo {
set foo(value);
get foo(): string;
}
```
#### Preserve attributes order for element node ([#10958](https://github.com/prettier/prettier/pull/10958) by [@dcyriller](https://github.comdcyriller))
```handlebars
{{!-- Input --}}
{{!-- Prettier stable --}}
{{!-- Prettier main --}}
```
#### Track cursor position properly when it’s at the end of the range to format ([#10938](https://github.com/prettier/prettier/pull/10938) by [@j-f1](https://github.com/j-f1))
Previously, if the cursor was at the end of the range to format, it would simply be placed back at the end of the updated range.
Now, it will be repositioned if Prettier decides to add additional code to the end of the range (such as a semicolon).
```jsx
// Input (<|> represents the cursor)
const someVariable = myOtherVariable<|>
// range to format: ^^^^^^^^^^^^^^^
// Prettier stable
const someVariable = myOtherVariable;<|>
// range to format: ^^^^^^^^^^^^^^^
// Prettier main
const someVariable = myOtherVariable<|>;
// range to format: ^^^^^^^^^^^^^^^
```
#### Break the LHS of type alias that has complex type parameters ([#10901](https://github.com/prettier/prettier/pull/10901) by [@sosukesuzuki](https://github.com/sosukesuzuki))
```ts
// Input
type FieldLayoutWith<
T extends string,
S extends unknown = { width: string }
> = {
type: T;
code: string;
size: S;
};
// Prettier stable
type FieldLayoutWith =
{
type: T;
code: string;
size: S;
};
// Prettier main
type FieldLayoutWith<
T extends string,
S extends unknown = { width: string }
> = {
type: T;
code: string;
size: S;
};
```
#### Break the LHS of assignments that has complex type parameters ([#10916](https://github.com/prettier/prettier/pull/10916) by [@sosukesuzuki](https://github.com/sosukesuzuki))
```ts
// Input
const map: Map<
Function,
Map
> = new Map();
// Prettier stable
const map: Map> =
new Map();
// Prettier main
const map: Map<
Function,
Map
> = new Map();
```
#### Fix incorrectly wrapped arrow functions with return types ([#10940](https://github.com/prettier/prettier/pull/10940) by [@thorn0](https://github.com/thorn0))
```ts
// Input
longfunctionWithCall12("bla", foo, (thing: string): complex> => {
code();
});
// Prettier stable
longfunctionWithCall12("bla", foo, (thing: string): complex<
type
> => {
code();
});
// Prettier main
longfunctionWithCall12(
"bla",
foo,
(thing: string): complex> => {
code();
}
);
```
#### Avoid breaking call expressions after assignments with complex type arguments ([#10949](https://github.com/prettier/prettier/pull/10949) by [@sosukesuzuki](https://github.com/sosukesuzuki))
```ts
// Input
const foo = call<{
prop1: string;
prop2: string;
prop3: string;
}>();
// Prettier stable
const foo =
call<{
prop1: string;
prop2: string;
prop3: string;
}>();
// Prettier main
const foo = call<{
prop1: string;
prop2: string;
prop3: string;
}>();
```
#### Fix order of `override` modifiers ([#10961](https://github.com/prettier/prettier/pull/10961) by [@sosukesuzuki](https://github.com/sosukesuzuki))
```ts
// Input
class Foo extends Bar {
abstract override foo: string;
}
// Prettier stable
class Foo extends Bar {
override abstract foo: string;
}
// Prettier main
class Foo extends Bar {
abstract override foo: string;
}
```
# 2.3.0
[diff](https://github.com/prettier/prettier/compare/2.2.1...2.3.0)
🔗 [Release Notes](https://prettier.io/blog/2021/05/09/2.3.0.html)
# 2.2.1
[diff](https://github.com/prettier/prettier/compare/2.2.0...2.2.1)
#### Fix formatting for AssignmentExpression with ClassExpression ([#9741](https://github.com/prettier/prettier/pull/9741) by [@sosukesuzuki](https://github.com/sosukesuzuki))
```js
// Input
module.exports = class A extends B {
method() {
console.log("foo");
}
};
// Prettier 2.2.0
module.exports = class A extends (
B
) {
method() {
console.log("foo");
}
};
// Prettier 2.2.1
module.exports = class A extends B {
method() {
console.log("foo");
}
};
```
# 2.2.0
[diff](https://github.com/prettier/prettier/compare/2.1.2...2.2.0)
🔗 [Release Notes](https://prettier.io/blog/2020/11/20/2.2.0.html)
# 2.1.2
[diff](https://github.com/prettier/prettier/compare/2.1.1...2.1.2)
#### Fix formatting for directives in fields ([#9116](https://github.com/prettier/prettier/pull/9116) by [@sosukesuzuki](https://github.com/sosukesuzuki))
```graphql
# Input
type Query {
someQuery(id: ID!, someOtherData: String!): String! @deprecated @isAuthenticated
versions: Versions!
}
# Prettier stable
type Query {
someQuery(id: ID!, someOtherData: String!): String!
@deprecated
@isAuthenticated
versions: Versions!
}
# Prettier master
type Query {
someQuery(id: ID!, someOtherData: String!): String!
@deprecated
@isAuthenticated
versions: Versions!
}
```
#### Fix line breaks for CSS in JS ([#9136](https://github.com/prettier/prettier/pull/9136) by [@sosukesuzuki](https://github.com/sosukesuzuki))
```js
// Input
styled.div`
// prettier-ignore
@media (aaaaaaaaaaaaa) {
z-index: ${(props) => (props.isComplete ? '1' : '0')};
}
`;
styled.div`
${props => getSize(props.$size.xs)}
${props => getSize(props.$size.sm, 'sm')}
${props => getSize(props.$size.md, 'md')}
`;
// Prettier stable
styled.div`
// prettier-ignore
@media (aaaaaaaaaaaaa) {
z-index: ${(props) =>
props.isComplete ? "1" : "0"};
}
`;
styled.div`
${(props) => getSize(props.$size.xs)}
${(props) => getSize(props.$size.sm, "sm")}
${(props) =>
getSize(props.$size.md, "md")}
`;
// Prettier master
styled.div`
// prettier-ignore
@media (aaaaaaaaaaaaa) {
z-index: ${(props) => (props.isComplete ? "1" : "0")};
}
`;
styled.div`
${(props) => getSize(props.$size.xs)}
${(props) => getSize(props.$size.sm, "sm")}
${(props) => getSize(props.$size.md, "md")}
`;
```
#### Fix comment printing in mapping and sequence ([#9143](https://github.com/prettier/prettier/pull/9143), [#9169](https://github.com/prettier/prettier/pull/9169) by [@sosukesuzuki](https://github.com/sosukesuzuki), [@fisker](https://github.com/fisker), fix in `yaml-unist-parser` by [@ikatyang](https://github.com/ikatyang))
```yaml
# Input
- a
# Should indent
- bb
---
- a: a
b: b
# Should print one empty line before
- another
# Prettier stable
- a
# Should indent
- bb
---
- a: a
b: b
# Should print one empty line before
- another
# Prettier master
- a
# Should indent
- bb
---
- a: a
b: b
# Should print one empty line before
- another
```
# 2.1.1
[diff](https://github.com/prettier/prettier/compare/2.1.0...2.1.1)
#### Fix format on html with frontMatter ([#9043](https://github.com/prettier/prettier/pull/9043) by [@fisker](https://github.com/fisker))
```html
---
layout: foo
---
Test abc.
TypeError: Cannot read property 'end' of undefined
...
---
layout: foo
---
Test abc.
```
#### Fix broken format for `...infer T` ([#9044](https://github.com/prettier/prettier/pull/9044) by [@fisker](https://github.com/fisker))
```ts
// Input
type Tail = T extends [infer U, ...infer R] ? R : never;
// Prettier stable
type Tail = T extends [infer U, ...(infer R)] ? R : never;
// Prettier master
type Tail = T extends [infer U, ...infer R] ? R : never;
```
#### Fix format on `style[lang="sass"]` ([#9051](https://github.com/prettier/prettier/pull/9051) by [@fisker](https://github.com/fisker))
```jsx
```
#### Fix self-closing blocks and blocks with `src` attribute format ([#9052](https://github.com/prettier/prettier/pull/9052), [#9055](https://github.com/prettier/prettier/pull/9055) by [@fisker](https://github.com/fisker))
```vue
```
# 2.1.0
[diff](https://github.com/prettier/prettier/compare/2.0.5...2.1.0)
🔗 [Release Notes](https://prettier.io/blog/2020/08/24/2.1.0.html)
# 2.0.5
[diff](https://github.com/prettier/prettier/compare/2.0.4...2.0.5)
#### Less: Fix formatting of `:extend` ([#7984](https://github.com/prettier/prettier/pull/7984) by [@fisker](https://github.com/fisker))
```less
// Input
.class {
&:extend(.some-class .some-other-class .some-very-loooooooooooooong-class all);
}
// Prettier 2.0.4
.class {
&:extend(
.some-class .some-other-class .some-very-loooooooooooooong-class all
);
}
// Prettier 2.0.4 (Second format)
.class {
&: extend(
.some-class .some-other-class .some-very-loooooooooooooong-class all
);
}
// Prettier 2.0.5
.class {
&:extend(
.some-class .some-other-class .some-very-loooooooooooooong-class all
);
}
```
#### Editor integration: Use [`resolve`](https://www.npmjs.com/package/resolve) if builtin `require.resolve` is overridden ([#8072](https://github.com/prettier/prettier/pull/8072) by [@fisker](https://github.com/fisker))
This fixes issues that the users of Atom and WebStorm faced with 2.0.4.
Prettier now switches to using the `resolve` module for resolving configuration files and plugins if it detects that `require.resolve` isn't Node's builtin function (doesn't support the second argument), which happens in environments like editor extensions. To force the fallback, set the `PRETTIER_FALLBACK_RESOLVE` environment variable to `true`.
# 2.0.4
[diff](https://github.com/prettier/prettier/compare/2.0.3...2.0.4)
#### Revert [#7869](https://github.com/prettier/prettier/pull/7869), "[TypeScript] format TSAsExpression with same logic as BinaryExpression" ([#7958](https://github.com/prettier/prettier/pull/7958))
# 2.0.3
[diff](https://github.com/prettier/prettier/compare/2.0.2...2.0.3)
### JavaScript
#### Fix `prettier-ignore` inside JSX ([#7877](https://github.com/prettier/prettier/pull/7877) by [@fisker](https://github.com/fisker))
```jsx
// Input
{
/* prettier-ignore */
x ? :
}
;
// Prettier 2.0.2 (first output)
{/* prettier-ignore */
x ? : }
;
// Prettier 2.0.2 (second output)
{/* prettier-ignore */ x ? : }
;
// Prettier 2.0.3
{
/* prettier-ignore */
x ? :
}
;
```
#### Fix regressions in styled-components template literals ([#7883](https://github.com/prettier/prettier/pull/7883) by [@thorn0](https://github.com/thorn0))
```js
// Input
const Icon = styled.div`
background: var(--${background});
${Link}:not(:first-child) {
fill: rebeccapurple;
}
`;
// Prettier 2.0.2
const Icon = styled.div`
background: var(-- ${background});
${Link}:not (:first-child) {
fill: rebeccapurple;
}
`;
// Prettier 2.0.3
const Icon = styled.div`
background: var(--${background});
${Link}:not(:first-child) {
fill: rebeccapurple;
}
`;
```
#### Fix: line endings were not always converted properly in multiline strings and comments ([#7891](https://github.com/prettier/prettier/pull/7891) by [@sidharthv96](https://github.com/sidharthv96))
```
// Input
export const IAmIncredibleLongFunctionName = IAmAnotherFunctionName(
(_0: IAmIncredibleLongParameterType) => {
setTimeout(() => {
/*
Multiline comment
Multiline comment
Multiline comment
*/
console.log(
"Multiline string\
Multiline string\
Multiline string"
);
});
}
);
// Prettier 2.0.2
export const IAmIncredibleLongFunctionName = IAmAnotherFunctionName(
(_0: IAmIncredibleLongParameterType) => {
setTimeout(() => {
/*
Multiline comment
Multiline comment
Multiline comment
*/
console.log(
"Multiline string\
Multiline string\
Multiline string"
);
});
}
);
// Prettier 2.0.3: same as input
```
#### Fix bug with holes in array literals ([#7911](https://github.com/prettier/prettier/pull/7911) by [@bakkot](https://github.com/bakkot))
```jsx
// Input
new Test()
.test()
.test([, 0])
.test();
// Prettier 2.0.2
[error] in.js: TypeError: Cannot read property 'type' of null
// Prettier 2.0.3
new Test().test().test([, 0]).test();
```
### TypeScript
#### Wrap TSAsExpression ([#7869](https://github.com/prettier/prettier/pull/7869) by [@sosukesuzuki](https://github.com/sosukesuzuki))
```ts
// Input
const value = thisIsAnIdentifier as ThisIsAReallyReallyReallyReallyReallyReallyReallyReallyReallyReallyReallyLongInterface;
// Prettier 2.0.2
const value = thisIsAnIdentifier as ThisIsAReallyReallyReallyReallyReallyReallyReallyReallyReallyReallyReallyLongInterface;
// Prettier 2.0.3
const value =
thisIsAnIdentifier as
ThisIsAReallyReallyReallyReallyReallyReallyReallyReallyReallyReallyReallyLongInterface;
```
### Flow
#### Print dangling comments for inexact object type ([#7892](https://github.com/prettier/prettier/pull/7892) by [@sosukesuzuki](https://github.com/sosukesuzuki))
```js
// Input
type Foo = {
// comment
...,
};
// Prettier 2.0.2
Error: Comment "comment" was not printed. Please report this error!
// Prettier 2.0.3
type Foo = {
// comment
...,
};
```
#### Do not add comma for explicit inexact object with indexer property or no properties ([#7923](https://github.com/prettier/prettier/pull/7923) by [@DmitryGonchar](https://github.com/DmitryGonchar))
```jsx
// Input
type T = {
[string]: number,
...,
}
type T = {
// comment
...,
}
// Prettier 2.0.2
type T = {
[string]: number,
...,
}
type T = {
// comment
...,
}
// Prettier 2.0.3
type T = {
[string]: number,
...
}
type T = {
// comment
...
}
```
### HTML
#### Fix printing of ignored empty inline elements ([#7867](https://github.com/prettier/prettier/pull/7867) by [@fisker](https://github.com/fisker))
```html
____
```
#### Format `script` and `style` inside tags with a colon in the name ([#7916](https://github.com/prettier/prettier/pull/7916) by [@fisker](https://github.com/fisker))
```html
```
### Other changes
- Workaround for `require.resolve` in prettier-vscode ([#7951](https://github.com/prettier/prettier/pull/7951) by [@thorn0](https://github.com/thorn0))
- Fix unstable Angular expression binding ([#7924](https://github.com/prettier/prettier/pull/7924) by [@fisker](https://github.com/fisker))
- Update `isSCSS` regex ([#7922](https://github.com/prettier/prettier/pull/7922) by [@fisker](https://github.com/fisker))
- Fix formatting of empty files ([#7921](https://github.com/prettier/prettier/pull/7921) by [@fisker](https://github.com/fisker))
# 2.0.2
[diff](https://github.com/prettier/prettier/compare/2.0.1...2.0.2)
### 2.0 regressions
#### JavaScript: Fix formatting of pseudo-elements and pseudo-classes in styled-components template literals ([#7842](https://github.com/prettier/prettier/pull/7842) by [@thorn0](https://github.com/thorn0))
```jsx
// Input
const Foo = styled.div`
${media.smallDown}::before {}
`;
// Prettier 2.0.0
const Foo = styled.div`
${media.smallDown}: : before{
}
`;
// Prettier 2.0.2
const Foo = styled.div`
${media.smallDown}::before {
}
`;
```
#### TypeScript: Avoid trailing commas on index signatures with only one parameter ([#7836](https://github.com/prettier/prettier/pull/7836) by [@bakkot](https://github.com/bakkot))
TypeScript index signatures technically allow multiple parameters and trailing commas, but it's an error to have multiple parameters there, and Babel's TypeScript parser does not accept them. So Prettier now avoids putting a trailing comma there when you have only one parameter.
```ts
// Input
export type A = {
a?: {
[
x: string
]: typeof SomeLongLongLongTypeName[keyof typeof SomeLongLongLongTypeName];
} | null;
};
// Prettier 2.0.0
export type A = {
a?: {
[
x: string,
]: typeof SomeLongLongLongTypeName[keyof typeof SomeLongLongLongTypeName];
} | null;
};
// Prettier 2.0.2
export type A = {
a?: {
[
x: string
]: typeof SomeLongLongLongTypeName[keyof typeof SomeLongLongLongTypeName];
} | null;
};
```
#### Revert "markdown: fix redundant leading spaces in markdown list" ([#7847](https://github.com/prettier/prettier/pull/7847))
See [#7846](https://github.com/prettier/prettier/issues/7846)
### Other changes
#### TypeScript: Fix `prettier-ignore` in union types ([#7798](https://github.com/prettier/prettier/pull/7798) by [@thorn0](https://github.com/thorn0))
```ts
// Input
export type a =
// foo
| foo1&foo2
// prettier-ignore
| bar1&bar2
// baz
| baz1&baz2;
// Prettier 2.0.0
export type a =
// foo
| foo1&foo2
// prettier-ignore
// prettier-ignore
| (bar1 & bar2)
// baz
| (baz1 & baz2);
// Prettier 2.0.2
export type a =
// foo
| (foo1 & foo2)
// prettier-ignore
| bar1&bar2
// baz
| (baz1 & baz2);
```
# 2.0.1
[diff](https://github.com/prettier/prettier/compare/2.0.0...2.0.1)
#### API: Fix build script to not corrupt `import-fresh` module ([#7820](https://github.com/prettier/prettier/pull/7820) by [@thorn0](https://github.com/thorn0))
# 2.0.0
[diff](https://github.com/prettier/prettier/compare/1.19.1...2.0.0)
🔗 [Release Notes](https://prettier.io/blog/2020/03/21/2.0.0.html)
# 1.19.1
[diff](https://github.com/prettier/prettier/compare/1.19.0...1.19.1)
### CLI
#### Fix `--stdin` regression in 1.19.0 ([#6894](https://github.com/prettier/prettier/pull/6894) by [@lydell](https://github.com/lydell))
```
// Prettier stable
$ echo "test" | prettier --stdin --parser babel
[error] regeneratorRuntime is not defined
// Prettier master
$ echo "test" | prettier --stdin --parser babel
test;
```
### TypeScript
#### Fix formatting of union type as arrow function return type ([#6896](https://github.com/prettier/prettier/pull/6896) by [@thorn0](https://github.com/thorn0))
```jsx
// Input
export const getVehicleDescriptor = async (
vehicleId: string,
): Promise => {}
// Prettier stable
export const getVehicleDescriptor = async (
vehicleId: string
): Promise<| Collections.Parts.PrintedCircuitBoardAssembly["attributes"]
| undefined> => {};
// Prettier master
export const getVehicleDescriptor = async (
vehicleId: string
): Promise<
Collections.Parts.PrintedCircuitBoardAssembly["attributes"] | undefined
> => {};
```
# 1.19.0
[diff](https://github.com/prettier/prettier/compare/1.18.2...1.19.0)
🔗 [Release Notes](https://prettier.io/blog/2019/11/09/1.19.0.html)
# 1.18.2
[diff](https://github.com/prettier/prettier/compare/1.18.1...1.18.2)
- TypeScript: only add trailing commas in tuples for `--trailing-comma=all` ([#6199] by [@duailibe])
In Prettier 1.18 we added trailing commas in tuples when `--trailing-comma=all`, but it was also adding for `--trailing-comma=es5`.
[#6199]: https://github.com/prettier/prettier/pull/6199
[@duailibe]: https://github.com/duailibe
# 1.18.1
[diff](https://github.com/prettier/prettier/compare/1.18.0...1.18.1)
- TypeScript: Add trailing comma in tsx, only for arrow function ([#6190] by [@sosukesuzuki])
Prettier inserts a trailing comma to single type parameter for arrow functions in tsx, since v 1.18. But, this feature inserts a trailing comma to type parameter for besides arrow functions too (e.g, function , interface). This change fix it.
```tsx
// Input
interface Interface1 {
one: "one";
}
function function1() {
return "one";
}
// Output (Prettier 1.18.0)
interface Interface1 {
one: "one";
}
function function1() {
return "one";
}
// Output (Prettier 1.18.1)
interface Interface1 {
one: "one";
}
function function1() {
return "one";
}
```
- Config: Match dotfiles in config overrides ([#6194] by [@duailibe])
When using [`overrides`](https://prettier.io/docs/en/configuration.html#configuration-overrides) in the config file, Prettier was not matching dotfiles (files that start with `.`). This was fixed in 1.18.1
[#6190]: https://github.com/prettier/prettier/pull/6190
[#6194]: https://github.com/prettier/prettier/pull/6194
[@duailibe]: https://github.com/duailibe
[@sosukesuzuki]: https://github.com/sosukesuzuki
# 1.18.0
[diff](https://github.com/prettier/prettier/compare/1.17.1...1.18.0)
🔗 [Release Notes](https://prettier.io/blog/2019/06/06/1.18.0.html)
# 1.17.1
[diff](https://github.com/prettier/prettier/compare/1.17.0...1.17.1)
- Range: Fix ranged formatting not using the correct line width ([#6050] by [@mathieulj])
```js
// Input
function f() {
if (true) {
call("this line is 79 chars", "long", "it should", "stay as single line");
}
}
// Output (Prettier 1.17.0 run with --range-start 30 --range-end 110)
function f() {
if (true) {
call(
"this line is 79 chars",
"long",
"it should",
"stay as single line"
);
}
}
// Output (Prettier 1.17.0 run without range)
function f() {
if (true) {
call("this line is 79 chars", "long", "it should", "stay as single line");
}
}
// Output (Prettier 1.17.1 with and without range)
function f() {
if (true) {
call("this line is 79 chars", "long", "it should", "stay as single line");
}
}
```
- JavaScript: Fix closure compiler typecasts ([#5947] by [@jridgewell])
If a closing parenthesis follows after a typecast in an inner expression, the typecast would wrap everything to the that following parenthesis.
```js
// Input
test(/** @type {!Array} */(arrOrString).length);
test(/** @type {!Array} */((arrOrString)).length + 1);
// Output (Prettier 1.17.0)
test(/** @type {!Array} */ (arrOrString.length));
test(/** @type {!Array} */ (arrOrString.length + 1));
// Output (Prettier 1.17.1)
test(/** @type {!Array} */ (arrOrString).length);
test(/** @type {!Array} */ (arrOrString).length + 1);
```
- JavaScript: respect parenthesis around optional chaining before await ([#6087] by [@evilebottnawi])
```js
// Input
async function myFunction() {
var x = (await foo.bar.blah)?.hi;
}
// Output (Prettier 1.17.0)
async function myFunction() {
var x = await foo.bar.blah?.hi;
}
// Output (Prettier 1.17.1)
async function myFunction() {
var x = (await foo.bar.blah)?.hi;
}
```
- Handlebars: Fix {{else}}{{#if}} into {{else if}} merging ([#6080] by [@dcyriller])
```
// Input
{{#if a}}
a
{{else}}
{{#if c}}
c
{{/if}}
e
{{/if}}
// Output (Prettier 1.17.0)
{{#if a}}
a
{{else if c}}
c
e
{{/if}}
// Output (Prettier 1.17.1)
Code Sample
{{#if a}}
a
{{else}}
{{#if c}}
c
{{/if}}
e
{{/if}}
```
- JavaScript: Improved multiline closure compiler typecast comment detection ([#6070] by [@yangsu])
Previously, multiline closure compiler typecast comments with lines that
start with \* weren't flagged correctly and the subsequent parenthesis were
stripped. Prettier 1.17.1 fixes this issue.
```js
// Input
const style =/**
* @type {{
* width: number,
* }}
*/({
width,
});
// Output (Prettier 1.17.0)
const style =/**
* @type {{
* width: number,
* }}
*/ {
width,
};
// Output (Prettier 1.17.1)
const style =/**
* @type {{
* width: number,
* }}
*/({
width,
});
```
[@mathieulj]: https://github.com/mathieulj
[@yangsu]: https://github.com/yangsu
[@dcyriller]: https://github.com/dcyriller
[@jridgewell]: https://github.com/jridgewell
[@evilebottnawi]: https://github.com/evilebottnawi
[#6050]: https://github.com/prettier/prettier/pull/6050
[#6070]: https://github.com/prettier/prettier/pull/6070
[#6080]: https://github.com/prettier/prettier/pull/6080
[#6087]: https://github.com/prettier/prettier/pull/6087
# 1.17.0
[diff](https://github.com/prettier/prettier/compare/1.16.2...1.17.0)
🔗 [Release Notes](https://prettier.io/blog/2019/04/12/1.17.0.html)
# 1.16.4
[diff](https://github.com/prettier/prettier/compare/1.16.3...1.16.4)
- API: Fix `prettier.getSupportInfo()` reporting babel parser for older versions of Prettier. ([#5826] by [@azz])
In version `1.16.0` of Prettier, the `babylon` parser was renamed to `babel`. Unfortunately this lead to a minor breaking change: `prettier.getSupportInfo('1.15.0')` would report that it supported `babel`, not `babylon`, which breaks text-editor integrations. This has now been fixed.
[@azz]: https://github.com/azz
[#5826]: https://github.com/prettier/prettier/pull/5826
# 1.16.3
[diff](https://github.com/prettier/prettier/compare/1.16.2...1.16.3)
- TypeScript: Revert "Update typescript-estree to new package name" ([#5818] by [@ikatyang])
There's an internal change introduced in Prettier 1.16.2,
which updated `typescript-estree` to its new package name,
but unfortunately it broke the output
so we reverted it as a temporary workaround for now.
```ts
// Input
export default {
load(k: K, t: T) {
return {k, t};
}
}
// Output (Prettier 1.16.2)
export default {
load(k: K, t: T) {
return { k, t };
}
};
// Output (Prettier 1.16.3)
export default {
load(k: K, t: T) {
return { k, t };
}
};
```
[@ikatyang]: https://github.com/ikatyang
[#5818]: https://github.com/prettier/prettier/pull/5818
# 1.16.2
[diff](https://github.com/prettier/prettier/compare/1.16.1...1.16.2)
- CLI: Fix CI detection to avoid unwanted TTY behavior ([#5804] by [@kachkaev])
In Prettier 1.16.0 and 1.16.1, `--list-different` and `--check` logged every file in some CI environments, instead of just unformatted files.
This unwanted behavior is now fixed.
- HTML: Do not format non-normal whitespace as normal whitespace ([#5797] by [@ikatyang])
Previously, only non-breaking whitespaces (U+00A0) are marked as non-normal whitespace,
which means other non-normal whitespaces such as non-breaking narrow whitespaces (U+202F)
could be formatted as normal whitespaces, which breaks the output. We now follow the spec to
exclude all non-[ASCII whitespace](https://infra.spec.whatwg.org/#ascii-whitespace) from whitespace normalization.
(`·` represents a non-breaking narrow whitespace)
```html
Prix·:·32·€
Prix : 32 €
Prix·:·32·€
```
- JavaScript: Fix record type cast comment detection ([#5793] by [@yangsu])
Previously, type cast comments with record types were ignored and prettier
stripped the subsequent parens. Prettier 1.16.2 handles these cases correctly.
```js
// Input
const v = /** @type {{key: number}} */ (value);
// Output (Prettier 1.16.1)
const v = /** @type {{key: number}} */ value;
// Output (Prettier 1.16.2)
const v = /** @type {{key: number}} */ (value);
```
[@ikatyang]: https://github.com/ikatyang
[@kachkaev]: https://github.com/kachkaev
[@yangsu]: https://github.com/yangsu
[#5793]: https://github.com/prettier/prettier/pull/5793
[#5797]: https://github.com/prettier/prettier/pull/5797
[#5804]: https://github.com/prettier/prettier/pull/5804
# 1.16.1
[diff](https://github.com/prettier/prettier/compare/1.16.0...1.16.1)
- JavaScript: Do not format functions with arguments as react hooks ([#5778] by [@SimenB])
The formatting added in Prettier 1.16 would format any function receiving an
arrow function and an array literal to match React Hook's documentation.
Prettier will now format this the same as before that change if the arrow
function receives any arguments.
```js
// Input
["red", "white", "blue", "black", "hotpink", "rebeccapurple"].reduce(
(allColors, color) => {
return allColors.concat(color);
},
[]
);
// Output (Prettier 1.16.0)
["red", "white", "blue", "black", "hotpink", "rebeccapurple"].reduce((
allColors,
color
) => {
return allColors.concat(color);
}, []);
// Output (Prettier 1.16.1)
["red", "white", "blue", "black", "hotpink", "rebeccapurple"].reduce(
(allColors, color) => {
return allColors.concat(color);
},
[]
);
```
- JavaScript: Add necessary parentheses for decorators ([#5785] by [@ikatyang])
Parentheses for decorators with nested call expressions are optional for legacy decorators
but they're required for decorators in the current [proposal](https://tc39.github.io/proposal-decorators/#sec-syntax).
```js
// Input
class X {
@(computed().volatile())
prop
}
// Output (Prettier 1.16.0)
class X {
@computed().volatile()
prop
}
// Output (Prettier 1.16.1)
class X {
@(computed().volatile())
prop
}
```
- TypeScript: Stable parentheses for function type in the return type of arrow function ([#5790] by [@ikatyang])
There's a regression introduced in 1.16 that
parentheses for function type in the return type of arrow function were kept adding/removing.
Their parentheses are always printed now.
```ts
// Input
const foo = (): (() => void) => (): void => null;
const bar = (): () => void => (): void => null;
// First Output (Prettier 1.16.0)
const foo = (): () => void => (): void => null;
const bar = (): (() => void) => (): void => null;
// Second Output (Prettier 1.16.0)
const foo = (): (() => void) => (): void => null;
const bar = (): () => void => (): void => null;
// Output (Prettier 1.16.1)
const foo = (): (() => void) => (): void => null;
const bar = (): (() => void) => (): void => null;
```
- MDX: Correctly recognize inline JSX ([#5783] by [@ikatyang])
Previously, some inline JSXs are wrongly recognized as block HTML/JSX,
which causes unexpected behaviors. This issue is now fixed.
```md
_foo bar_
_foo
bar_
_foo bar_
```
[@ikatyang]: https://github.com/ikatyang
[@simenb]: https://github.com/SimenB
[#5778]: https://github.com/prettier/prettier/pull/5778
[#5783]: https://github.com/prettier/prettier/pull/5783
[#5785]: https://github.com/prettier/prettier/pull/5785
[#5790]: https://github.com/prettier/prettier/pull/5790
# 1.16.0
[diff](https://github.com/prettier/prettier/compare/1.15.3...1.16.0)
🔗 [Release Notes](https://prettier.io/blog/2019/01/20/1.16.0.html)
# 1.15.3
[diff](https://github.com/prettier/prettier/compare/1.15.2...1.15.3)
- JavaScript: support `htm` ([#5565](https://github.com/prettier/prettier/pull/5565))
- JavaScript: support logical assignment operator ([#5489](https://github.com/prettier/prettier/pull/5489))
- JavaScript: do not add quotes for interpolation-only attributes in `html` templates ([#5544](https://github.com/prettier/prettier/pull/5544))
- JavaScript: add missing parenthesis for binary in optional member ([#5543](https://github.com/prettier/prettier/pull/5543))
- JavaScript: fix a parser regression ([#5530](https://github.com/prettier/prettier/pull/5530))
- JavaScript: improve union types with leading comments ([#5575](https://github.com/prettier/prettier/pull/5575))
- TypeScript: support BigInt ([#5546](https://github.com/prettier/prettier/pull/5546), [#5577](https://github.com/prettier/prettier/pull/5577))
- TypeScript: inline method decorators should stay inlined ([#5444](https://github.com/prettier/prettier/pull/5444))
- TypeScript: do not change `module` into `namespace` and break/hug their body correctly ([#5551](https://github.com/prettier/prettier/pull/5551))
- TypeScript: do not add invalid semicolon for construct in interface with `// prettier-ignore` ([#5469](https://github.com/prettier/prettier/pull/5469))
- HTML: do not touch comments ([#5525](https://github.com/prettier/prettier/pull/5525))
- HTML: preserve bogus comments `<! ... >`/` ... >` ([#5565](https://github.com/prettier/prettier/pull/5565))
- HTML: support IE conditional start/end comment ([#5470](https://github.com/prettier/prettier/pull/5470))
- HTML: do not add extra indentation for js template in `