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<p>CSS selectors are used to select elements from HTML documents. Types include: Element Selector: Selects a specific element type. Class selector: Selects elements whose class name matches. ID selector: Selects elements whose ID matches. Wildcard selector: selects all elements. Descendant selector: Selects descendants of ancestor elements. Derived selector: selects elements whose attributes or values match.<p> <p>Introduction to CSS Selectors <p>CSS selectors are syntax rules used to select elements from an HTML document. By using selectors, we can apply styles, add behaviors, or manipulate specific HTML elements in JavaScript. <p>Selector type <p>CSS provides a variety of selector types, including:
<p>
or <div>
. .my-class
. #my-id
. *
. p a
. [type=submit]
. .my-class
Selects all elements with the class name "my-class". p:hover
Selects all elements that have a <p>
element on mouse hover. <code class="css">.my-class { color: blue; }</code><p>This will set the text color to blue for all elements with the class name "my-class". <p>Complex Selectors <p>You can also combine multiple selectors to create more complex selectors. For example:
div.container p
Selects all <p> in a
<div> element with class name "container"
elements. #my-id a:hover
Selects all <a>
elements within the element with ID "my-id" on mouseover. The above is the detailed content of How to use css selector. For more information, please follow other related articles on the PHP Chinese website!