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What does > in jquery mean?

青灯夜游

Release： 2022-03-01 18:26:29

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In jquery, ">" is a child element selector, which can only select child elements of a certain element; the syntax is "$("E > F")", where E is the parent element, and F is a sub-element, which means that all sub-elements F under the E element are selected.

What does > in jquery mean?

The operating environment of this tutorial: windows7 system, jquery1.10.2 version, Dell G3 computer.

In jquery, ">" refers to a sub-element selector, which is a type of hierarchical selector.

Child element selector (E>F)Only the child elements of a certain element can be selected, where E is the parent element and F is the child element, where E> What F represents is that all sub-elements F under the E element are selected.

Syntax:

1	`$("E > F")`

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All selectors in jQuery begin with a dollar sign: $().

Return value: Return the matching result set

Example:

<!DOCTYPE html>
<html>
    <head>
        <script type="text/javascript" src="js/jquery-1.10.2.min.js"></script>
        <script>
            $(document).ready(function() {
                $("#main > *").css("border", "3px double red");
            });
        </script>
        <style>
            body {
                font-size: 14px;
            }
 
            span#main {
                display: block;
                background: yellow;
                height: 110px;
            }
 
            button {
                display: block;
                float: left;
                margin: 2px;
                font-size: 14px;
            }
 
            div {
                width: 90px;
                height: 90px;
                margin: 5px;
                float: left;
                background: #bbf;
                font-weight: bold;
            }
 
            div.mini {
                width: 30px;
                height: 30px;
                background: green;
            }
        </style>
    </head>
    <body>
        <span id="main">
            <div></div>
            <button>Child</button>
            <div class="mini"></div>
            <div>
                <div class="mini"></div>
                <div class="mini"></div>
            </div>
            <div><button>Grand</button></div>
            <div><span>A Span <em>in</em> child</span></div>
            <span>A Span in main</span>
        </span>
    </body>
</html>

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Analysis:

$ ("#main > *").css("border", "3px double red");

will match the child elements in the span element and must be the first in the child element collection An element, the following are the matching elements (purple)

What does > in jquery mean?

[Recommended learning: jQuery video tutorial, web front-end]

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