<p>CSS selector type: Basic selector: Select based on element name, including element selector, class selector and ID selector. Modifier selectors: Refine the base selector scope to include descendant selectors, subselectors, adjacent selectors, and pseudo-class selectors. Attribute selector: Select based on element attribute value, including attribute existence selector, attribute value selector and partial matching attribute value selector. Combine selectors: Combine multiple selectors, including comma-separated selectors and group selectors.
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CSS Selector Type
<p>CSS selectors are used to specify HTML elements or groups of elements to apply styles to them . There are four main types of CSS selectors:
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1. Basic selectors
<p>Basic selectors select elements by name, including:
-
Element selector: Select elements with specific HTML tags, such as
<p>
, <h1>
-
Class selector: Select elements with specific class attributes, such as
.primary
, .container
-
ID selector: Select elements with a specific ID attribute, such as
#main
, #contact
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2. Modifier selector <p>Modifier selectors are used to refine the selection range of the basic selector, including:
-
Descendant selector (blank): Select elements that are descendants of the parent element, such as
div p
-
Child selector (>): Select elements that directly belong to the parent element, such as
div > p
-
Adjacent selector ( ): Select the element immediately adjacent to the previous element, such as
p h1
-
Pseudo-class selector (:hover, :active): Select elements in a specific state, such as when the mouse is hovering (
:hover
), or when activated (:active
)
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3. Attribute selector
<p>Attribute selector selects elements according to their attribute values, including:
-
Attribute existence selector ([ Attribute]): Select elements with specific attributes, such as
[type]
-
Attribute value selector ([attribute="value"]): Select elements with specific attribute values, such as
[type="text"]
-
Partial matching attribute value selector ([attribute~="value"]): Select elements whose attribute values contain the specified substring, such as
[type~="text"]
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4. Combination selector
<p>Combined selectors allow multiple selectors to be combined together, for example:
-
Comma-separated selectors: Select elements that satisfy multiple selector conditions , such as
p, h1
-
Group selector (brackets): Group multiple selectors and apply the same group of styles, such as
(p , h1) { ... }
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