Home > Article > Web Front-end > Xiaoqiang’s road to HTML5 mobile development (35) - Detailed explanation of filters in jQuery

Xiaoqiang’s road to HTML5 mobile development (35) - Detailed explanation of filters in jQuery

黄舟Original: 2017-02-04 14:47:281301browse

1. Basic filter selector
:first
:last
:not(selector) :Nodes other than the nodes matched by the selector
:even :even
:odd :odd
:eq(index)
:gt(index) : Bigger than him

:lt(index) : Smaller than him

<html>  
    <head>  
        <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.0/jquery.min.js"></script>  
        <script>  
            $(function(){  
                $(&#39;#b1&#39;).click(function(){  
                    //$(&#39;tr:first&#39;).css(&#39;background-color&#39;,&#39;#cccccc&#39;);  
                    //$(&#39;tbody tr:first&#39;).css(&#39;background-color&#39;,&#39;#cccccc&#39;);  
                    //$(&#39;tbody tr:not(#tr2)&#39;).css(&#39;background-color&#39;,&#39;#cccccc&#39;);  
                    //$(&#39;tbody tr:even&#39;).css(&#39;background-color&#39;,&#39;#cccccc&#39;);  
                    $(&#39;tbody tr:eq(2)&#39;).css(&#39;background-color&#39;,&#39;#cccccc&#39;);  
                });  
            });  
        </script>  
    </head>  
    <body>  
        <table border="1" cellpadding="0" cellspacing="0" width="60%">  
            <thead>  
                <tr>  
                    <td>name</td><td>age</td>  
                </tr>  
            </thead>  
            <tbody>  
                <tr><td>zs</d><td>22</td></tr>  
                <tr id="tr2"><td>ls</d><td>22</td></tr>  
                <tr><td>ww</d><td>22</td></tr>  
                <tr><td>ll</d><td>22</td></tr>  
            </tbody>  
        </table>  
        <input type="button" value="clickMe" id="b1"/>  
    <body>  
</html>

2. Content filtering selector
:contains(text)
:empty: A node with no child nodes or a node with empty text content
:has(selector)
:parent: A node that contains a parent node

<html>  
    <head>  
        <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.0/jquery.min.js"></script>  
        <script>  
            $(function(){  
                $(&#39;#b1&#39;).click(function(){  
                    $(&#39;:contains(hello)&#39;).css(&#39;background&#39;,&#39;red&#39;);  
                    //$(&#39;:empty&#39;).css(&#39;&#39;,&#39;&#39;);  
                    //$(&#39;p :has(p)&#39;).css(&#39;&#39;,&#39;&#39;);  
                });  
            });  
        </script>  
    </head>  
    <body>  
        <p>  
            <p>hello</p>  
            <p>你好</p>  
            <p>  
                <p>java</p>  
            <p>  
            <input type="button" value="clickMe" id="b1"/>  
        </p>  
    </body>  
  
</html>

Xiaoqiang’s road to HTML5 mobile development (35) - Detailed explanation of filters in jQuery

Actually, my goal is not to make the entire screen turn red. Why does it all turn red? Look at the code below again. I added a p

$(&#39;p:contains(hello)&#39;).css(&#39;background&#39;,&#39;red&#39;);

Xiaoqiang’s road to HTML5 mobile development (35) - Detailed explanation of filters in jQuery

in front of contains(hell0). You can see that although it is not full screen, it is not the result I want. How can I do this? What about changing just the background below hello to red? You can do this

$(&#39;p p:contains(hello)&#39;).css(&#39;background&#39;,&#39;red&#39;);

Xiaoqiang’s road to HTML5 mobile development (35) - Detailed explanation of filters in jQuery

3. Visibility filter selector
:hidden
Find input type="hidden" and display=none:visible

$(function(){  
    $(&#39;#a1&#39;).click(function(){  
        $(&#39;p:hidden&#39;).css(&#39;display&#39;,&#39;block&#39;);  
        //如过有这个样式则去掉，没有则加上  
        $(&#39;#d1&#39;).toggleClass(&#39;show&#39;);  
    });  
    //每点击一次，执行一个函数，循环执行  
    $(&#39;#a1&#39;).toggle(function(){  
        //$(&#39;#d1&#39;).css(&#39;display&#39;,&#39;block&#39;);  
        $(&#39;#d1&#39;).show(400); //在400毫秒种打开  
        //或者使用slow fast normal三个参数  
        $(&#39;#d1&#39;).show(slow);  
    },function(){  
        //$(&#39;#d1&#39;).css(&#39;display&#39;,&#39;none&#39;);  
        $(&#39;#d1&#39;).hide();  
    });  
});

4. Filter selector
(1) Attribute filter selector [attribute]
[attribute=value]
[attribute!=value]

<html>  
    <head>  
        <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.0/jquery.min.js"></script>  
        <script>  
            $(function(){  
                $(&#39;#b1&#39;).click(function(){  
                    $(&#39;p[id=p1]&#39;).html(&#39;hello java&#39;);  
                });  
            });  
        </script>  
    </head>  
    <body>  
        <p id="p1">hello</p>  
        <p>world</p>  
        <input type="button" value="click" id="b1"/>  
    </body>  
</html>

(2), Child element filter selector: Returns all matching child nodes under the parent node
:nth-child(index/even/odd)
n starts from 1

<html>  
    <head>  
        <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.0/jquery.min.js"></script>  
        <script>  
            $(function(){  
                $(&#39;#b1&#39;).click(function(){  
                    $(&#39;ul li:nth-child(1)&#39;).html(&#39;item100&#39;);  
                });  
            });  
        </script>  
    </head>  
    <body>  
            <ul>  
                <li>item1</li>  
                <li>item2</li>  
                <li>item3</li>  
  
            </ul>  
            <ul>  
                <li>item4</li>  
                <li>item5</li>  
                <li>item6</li>  
  
            </ul>  
            <input type="button" value="click" id="b1"/>  
    </body>  
</html>

(3), form object Attribute filter selector
:enabled
:disabled //The text input box cannot be entered
:checked//The selected node
:selected

5, form selector
:input $(':input');Return all input
:text
:pasword
:checkbox
:radio
:submit
:image
:reset
:button

The above is Xiaoqiang’s HTML5 mobile development road (35) - detailed explanation of filters in jQuery. For more related content, please pay attention to the PHP Chinese website (www.php.cn) !

Statement：

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Previous article：Xiaoqiang’s HTML5 mobile development road (34) - Selector in jQueryNext article：Xiaoqiang’s HTML5 mobile development road (34) - Selector in jQuery

See more

Xiaoqiang’s road to HTML5 mobile development (35) - Detailed explanation of filters in jQuery

Related articles