Which characters are valid in CSS class names/selectors?
网页2022年12月31日 · As of 2022, the CSS spec defines a class-name (in a .css rule's selector) as "." + ident , and the lexical scanner rules for ident specifially allow any character outside of 0x00-0x7F in a class name after an initial [_A-Za-z] character, so the [_a-zA-Z0-9-]* pattern posted here is incorrect.
CSS . class Selector - W3Schools
网页The .class selector selects elements with a specific class attribute. To select elements with a specific class, write a period (.) character, followed by the name of the class. You can also specify that only specific HTML elements should be affected by a class.
What's the best way to name IDs and classes in CSS and HTML?
网页2014年12月18日 · They should be kept fairly generic - so instead of, say, warningMessage you could create one style message with the basic layout style, and then warning, info, and error styles with different colours. Then use <div class="message warning">etc</div>. You should also use HTML elements where applicable.
CSS class naming convention - Stack Overflow
网页2011年10月28日 · If you're interested in CSS class naming conventions I suggest to consider one very useful convention named BEM (Block, Element, Modifier). UPDATE. Please read more about it here - http://getbem.com/naming/ - that's a newer version that renders the following answer obsolete.
CSS Selectors – Cheat Sheet for Class, Name, Child Selector List
网页2022年9月29日 · The class selector matches and selects HTML elements based on the value of their given class. Specifically, it selects every single element in the document with that specific class name. With the class selector, you can select multiple elements at once and style them the same way without copying and pasting the same styles for …
Class selectors - CSS: Cascading Style Sheets | MDN - MDN Web …
网页2024年7月5日 · The class_name value must be a valid CSS identifier. HTML class attributes which are not valid CSS identifiers must be escaped before they can be used in class selectors.
Type, class, and ID selectors - Learn web development | MDN
网页2024年7月25日 · To learn about the different CSS selectors we can use to apply CSS to a document. Type selectors A type selector is sometimes referred to as a tag name selector or element selector because it selects an HTML tag/element in your document.
CSS selectors and combinators - CSS: Cascading Style Sheets - MDN
网页2024年6月22日 · The class selector selects all elements that have the given class attribute denoted by the class name prefixed with a period (. For example, .index will match any element that has class="index" . The ID selector selects an element based on the value of …
Class - CSS-Tricks
网页2021年6月29日 · You can give a class any name that starts with a letter, hyphen (-), or underscore (_). You can use numbers in class names, but a number can’t be the first character or the second character after a hyphen.
Best Practices for Naming Classes in HTML and CSS Files
网页2023年7月23日 · Selecting appropriate class names is a crucial aspect of writing clean and maintainable HTML and CSS code. By following best practices such as being descriptive, using semantic naming, adhering to a consistent convention, and avoiding presentational names, you can significantly enhance your codebase.
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