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How to select and invert all checkboxes in js

一个新手
一个新手Original
2017-09-30 09:04:382414browse

This article is about check boxes, which have two forms: 1. Select all and inverse selection are implemented by 2 buttons; 2. Select all and inverse selection are implemented by one button. 


<!DOCTYPE html><html>
    <head>
        <meta charset="UTF-8">
        <title>复选框demo</title>
        <script src="../js/jquery-1.10.2.js" type="text/javascript"></script>
        <style>
            body{ text-align:center} 
            .con{ margin:100px auto; width:800px; height:400px; border:1px solid #F00; padding-top: 50px;} 
        </style> 
    </head>
    <body>
        <p class="con">
            <span><input type=&#39;checkbox&#39; name=&#39;select&#39; onclick=&#39;allSelect()&#39;>全选</span>
            <span><input type=&#39;checkbox&#39; name=&#39;cancel&#39; onclick=&#39;unAllSelect()&#39;>反选</span>
            <span><input type=&#39;checkbox&#39; name=&#39;fruit&#39; />苹果</span>
            <span><input type=&#39;checkbox&#39; name=&#39;fruit&#39; />香蕉</span>
            <span><input type=&#39;checkbox&#39; name=&#39;fruit&#39; />梨子</span>
            <span><input type=&#39;checkbox&#39; name=&#39;fruit&#39; />桃子</span>
            <span><input type=&#39;checkbox&#39; name=&#39;fruit&#39; />西瓜</span>
            
            <br><br><br>
            
            <span><input type=&#39;checkbox&#39; id="allBook"  name=&#39;allBook&#39; />全选</span>
            <span><input type=&#39;checkbox&#39; name=&#39;book&#39; />老子</span>
            <span><input type=&#39;checkbox&#39; name=&#39;book&#39; />尚书</span>
            <span><input type=&#39;checkbox&#39; name=&#39;book&#39; />周易</span>
            <span><input type=&#39;checkbox&#39; name=&#39;book&#39; />诗经</span>
            <span><input type=&#39;checkbox&#39; name=&#39;book&#39; />孟子</span>
            <span><input type=&#39;checkbox&#39; name=&#39;book&#39; />中庸</span>
            <script type="text/javascript">
    //全选
    function allSelect(){
        $("input[name=&#39;fruit&#39;]").prop("checked", "checked");
        $("input[name=&#39;cancel&#39;]").removeAttr("checked");
    }    //反选
    function unAllSelect(){
        $("input[name=&#39;fruit&#39;]").removeAttr("checked");
        $("input[name=&#39;select&#39;]").removeAttr("checked");
    }    
    //单选    
            $("#allBook").click(function(){        
            if(this.checked){//            
            $("input[name=&#39;book&#39;]").attr("checked", true);            
            $("input[name=&#39;book&#39;]").prop("checked", "checked");
          }else{//          
          $("input[name=&#39;book&#39;]").attr("checked", false);            
          $("input[name=&#39;book&#39;]").removeAttr("checked");
          }
    });</script>
        </p>
    </body>
    </html>

I encountered a problem in practice - check fails to select all. The solution is to use prop method instead of attr. 


$("input[name=&#39;book&#39;]").attr("checked", "checked");
$("input[name=&#39;book&#39;]").prop("checked", "checked");

This may be related to the jQuery version.

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