Share jquery all selection and inverse selection examples-JS Tutorial-php.cn

Share jquery all selection and inverse selection examples

零下一度

Release： 2017-06-26 10:19:52

Original

1476 people have browsed it

This demo is suitable for comrades who are just learning jQuery.

On average, I eat a certain Licun rice roll 4 times a week at night, so the content is the ones I often order at night. Usually I eat for 14 yuan.

The effect is as shown:

##HTML code:

<span style="color: #008080"> 1</span> <span style="color: #0000ff"><</span><span style="color: #800000">ul </span><span style="color: #ff0000">id</span><span style="color: #0000ff">=&#39;food&#39;</span><span style="color: #0000ff">></span><span style="color: #008080"> 2</span>

Copy after login

8元 红豆沙

Copy after login

5元 青菜肠

Copy after login

2元 加底     7元 鸡蛋青菜粥

Copy after login


6元 白灼鲜蔬菜     7元 黄金南瓜粥

Copy after login

 3元 卤蛋

Copy after login

<br><span style="color: #0000ff"><</span><span style="color: #800000">input </span><span style="color: #ff0000">type</span><span style="color: #0000ff">="button"</span><span style="color: #ff0000"> value</span><span style="color: #0000ff">=&#39;全选&#39; </span><span style="color: #ff0000">id</span><span style="color: #0000ff">=&#39;selectAll&#39;</span><span style="color: #0000ff">></span><span style="color: #008080">13</span>     <span style="color: #0000ff"><</span><span style="color: #800000">input </span><span style="color: #ff0000">type</span><span style="color: #0000ff">="button"</span><span style="color: #ff0000"> value</span><span style="color: #0000ff">=&#39;全不选&#39; </span><span style="color: #ff0000">id</span><span style="color: #0000ff">=&#39;unselectAll&#39;</span><span style="color: #0000ff">></span><span style="color: #008080">14</span>

Copy after login

<br><span style="color: #0000ff"><</span><span style="color: #800000">input </span><span style="color: #ff0000">type</span><span style="color: #0000ff">="button"</span><span style="color: #ff0000"> value</span><span style="color: #0000ff">=&#39;反选&#39; </span><span style="color: #ff0000">id</span><span style="color: #0000ff">=&#39;reverse&#39;</span><span style="color: #0000ff">></span><span style="color: #008080">15</span>     <span style="color: #0000ff"><</span><span style="color: #800000">input </span><span style="color: #ff0000">type</span><span style="color: #0000ff">="button"</span><span style="color: #ff0000"> value</span><span style="color: #0000ff">=&#39;获得选中的值&#39; </span><span style="color: #ff0000">id</span><span style="color: #0000ff">=&#39;getnum&#39;</span><span style="color: #0000ff">></span><span style="color: #008080">16</span> <span style="color: #0000ff"></</span><span style="color: #800000">div</span><span style="color: #0000ff">><br><br><br></span>

Copy after login

JS code:

 1 <script src=&#39;./js/jquery.min.js&#39;></script> 2 <script> 3     //计算次数，当 #food 7个都选中时，#all 也选中 4     
 var num =0; 5     //#all 全选框选中时，#food 全部选中 6     $('#all').click(function(){ 7         
 if((this.checked)){ 8             $('#food :checkbox').prop('checked',true); 9         }else{10            
  $('#food :checkbox').prop('checked',false);11         }12     })13     //全选按钮14    
   $('#selectAll').click(function(){15         $(':checkbox').prop('checked',true);16         num = 7;17     })18    
   //全不选按钮19     $('#unselectAll').click(function(){20         $(':checkbox').prop('checked',false);21        
    num = 0;22     })23     //反选按钮24     $('#reverse').click(function(){25         var arr = [];26         
    $('#food :checkbox').each(function(){27             $(this).prop('checked',!$(this).prop('checked'));28         })
             $('#food>li>input').each(function(){30             if(this.checked){31                 
             arr.push($(this).val());32             }33         });34         num = arr.length;35         
             if(num == 7){36             $('#all').prop('checked',true);37         }else{38             
             $('#all').prop('checked',false);39         }40     })41     //获取价钱，显示出来42     
             $('#getnum').click(function(){43         getNum();44     });45     //全部#food框都选中时，#all 也选中46    
             $('#food :checkbox').click(function(){47         if(this.checked){48             num++;49         }else
             {             num--;51         }52         if(num == 7){53             
             $('#all').prop('checked',true);54         }else{55             $('#all').prop('checked',false);56         }
                  })58     //计算价钱59     function getNum(){60         var sum = 0;61         var arr = [];62         
                  $('#food>li>input').each(function(){63             if(this.checked){64                
                   //取value值，为字符串，转为数字65                arr.push(Number($(this).val()));66             }
                            });68         //遍历数组，取合69         arr.forEach(function(i){70             
                            sum += i;71         })72         alert("总共："+ sum + "元");73     }
                             </script>

Copy after login

The above is the detailed content of Share jquery all selection and inverse selection examples. For more information, please follow other related articles on the PHP Chinese website!