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The delicate art of writing CSS selectors When writing selectors you may find yourself torn between two worlds. On the one hand you want to be pretty specific about which elements you select. On the other hand, you want your selectors to remain easy to override and not be tightly coupled to the DOM structure. For example, when you want to select “the hero image in the content area of the card comp
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↑*element.class#id.class.class-2.class,.class-2.class .class-2.class + class-2.class > class-2.class ~ class-2* + *[attr][attr=val][attr~=val][attr*=val][attr^=val][attr$=val]:link :active :visited :hover:focus:checked:disabled:enabled:valid:invalid:required:optional:first-child:last-child:nth-child:nth-last-child:only-child:first-of-type:last-of-type:nth-of-type:nth-last-of-type:only-of-type:targ
The CSS Working Group Editor’s Draft for Selectors Level 4 includes several pseudo-class selectors that already have proposal candidates in most modern browsers. This guide will cover ones that currently have the best support along with examples to demonstrate how you can start using them today! Pseudo-class selectors are the ones that begin with the colon character “:” and match based on a state
When it comes to improving web rendering performance, we often spend time working on JavaScript code. But CSS has an important role to play too in how fast a web page renders. CSS selectors, in particular, can sometimes be slow for the browser engine to match to the DOM of the page, and this can become a big problem when the web page has a large DOM tree, a lot of CSS rules, and where the DOM chan
Some rules and APIs allow the use of selectors to query an AST. This page is intended to: Explain what selectors are Describe the syntax for creating selectors Describe what selectors can be used for What is a selector? A selector is a string that can be used to match nodes in an Abstract Syntax Tree (AST). This is useful for describing a particular syntax pattern in your code. The syntax for AST
How to make reusable components with pseudo-selectorsAn Introduction To Control Components Pseudo-selectors like :hover can make a huge impact on user experience, but they haven't composed well with React – until now! So you’ve built yourself a <Button> component, and it’s a darn good button at that. It’s got props to configure everything you’d ever need - the label, icon, colors, and even a loadi
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