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CSS selectors

    Simple Selectors

    • type selectors
    • universal selector (*)
    • attribute presence and value selectors
    • attribute substring selectors
    • class selectors
    • two classes (.c1.c2)
    • id selectors

    Pseudo-classes

    • :link
    • :visited
    • :hover
    • :active
    • :focus
    • :target
    • :lang
    • :enabled and :disabled
    • :checked
    • :root
    • :nth-child
    • :nth-of-type
    • :nth-child vs :nth-of-type
    • :nth-last-child
    • :nth-last-of-type
    • :first-child
    • :first-of-type
    • :last-child
    • :last-of-type
    • :only-child
    • :only-of-type
    • :empty
    • :not

    Pseudo-elements

    • ::first-line
    • ::first-letter
    • ::before and ::after
    • ::placeholder

    Combinators

    • child vs descendant selector
    • adjacent sibling selector (E1 + E2)
    • general sibling selector (E1 ~ E2)

    Specificity

    • Selector specificity
     
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    CSS universal selector

    on Mar 25, 2016

    The universal selector (*), matches the name of any element type. It matches any single element in the document tree. Some ways it can be used:

    * matches any element
    *.warning
    (equivalent to .warning)
    matches any element with class=warning
    #id1 * matches any descendendant of element with id=id1
    #id1 > * matches any direct child of element with id=id1

    Example – universal selector

    <style>
    #id1 * {
      border: 1px solid lightblue;
    }
    </style>
    
    <div id="id1">
      <p>p1</p1>
      <p>p2</p1>
    </div>
    
    <div id="id2">
      <p>p3</p1>
    </div>
    
    refresh done
    try it online

    Related

    • CSS type selectors - define style by element name
    • CSS attribute presence and value selectors
    • CSS attribute substring selectors
    • CSS class selectors - define style by class name
    • CSS - style for element having two classes (both)
    • CSS id selectors - define style by element id

    Specification

    • W3C CSS 3 universal selector specification

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    Posted in Tutorials | Tagged CSS, CSS selectors, Tutorials
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