fix(core): improved types for common utils (NativeScript#10628)

farfromrefug · web-flow · commit 17a94a2b3234 · 2025-01-13T18:39:15.000-08:00
diff --git a/packages/core/utils/types.ts b/packages/core/utils/types.ts
@@ -1,32 +1,32 @@
-export function isString(value: any): boolean {
+export function isString(value: any): value is string {
 	return typeof value === 'string' || value instanceof String;
 }
 
-export function isNumber(value: any): boolean {
+export function isNumber(value: any): value is number {
 	return typeof value === 'number' || value instanceof Number;
 }
 
-export function isBoolean(value: any): boolean {
+export function isBoolean(value: any): value is boolean {
 	return typeof value === 'boolean' || value instanceof Boolean;
 }
 
-export function isFunction(value: any): boolean {
+export function isFunction(value: any): value is Function {
 	if (!value) {
 		return false;
 	}
 
 	return typeof value === 'function';
 }
 
-export function isObject(value: any): boolean {
+export function isObject(value: any): value is Record<string,any> {
 	if (!value) {
 		return false;
 	}
 
 	return typeof value === 'object';
 }
 
-export function isUndefined(value: any): boolean {
+export function isUndefined(value: any): value is undefined {
 	return typeof value === 'undefined';
 }
 

Original file line number	Diff line number	Diff line change
`@@ -1,32 +1,32 @@`
`1`		`-export function isString(value: any): boolean {`
	`1`	`+export function isString(value: any): value is string {`
`2`	`2`	`return typeof value === 'string' \|\| value instanceof String;`
`3`	`3`	`}`
`4`	`4`
`5`		`-export function isNumber(value: any): boolean {`
	`5`	`+export function isNumber(value: any): value is number {`
`6`	`6`	`return typeof value === 'number' \|\| value instanceof Number;`
`7`	`7`	`}`
`8`	`8`
`9`		`-export function isBoolean(value: any): boolean {`
	`9`	`+export function isBoolean(value: any): value is boolean {`
`10`	`10`	`return typeof value === 'boolean' \|\| value instanceof Boolean;`
`11`	`11`	`}`
`12`	`12`
`13`		`-export function isFunction(value: any): boolean {`
	`13`	`+export function isFunction(value: any): value is Function {`
`14`	`14`	`if (!value) {`
`15`	`15`	`return false;`
`16`	`16`	`}`
`17`	`17`
`18`	`18`	`return typeof value === 'function';`
`19`	`19`	`}`
`20`	`20`
`21`		`-export function isObject(value: any): boolean {`
	`21`	`+export function isObject(value: any): value is Record<string,any> {`
`22`	`22`	`if (!value) {`
`23`	`23`	`return false;`
`24`	`24`	`}`
`25`	`25`
`26`	`26`	`return typeof value === 'object';`
`27`	`27`	`}`
`28`	`28`
`29`		`-export function isUndefined(value: any): boolean {`
	`29`	`+export function isUndefined(value: any): value is undefined {`
`30`	`30`	`return typeof value === 'undefined';`
`31`	`31`	`}`
`32`	`32`