jquery controls checkbox selection, inverse selection or no selection with one click

This article mainly introduces in detail the jquery one-click control of checkbox selection, inverse selection or no selection. It has certain reference value. Interested friends can refer to it. I hope it can help everyone.

The jquery attr() method may cause problems in obtaining the checked value of the tag, so the prop() method is used.

Hml's checkbox does not add a name, only p nesting is used.

If there is a better way, please give me some advice!!

//全选
$('#allChecked').change(function(){
   $('#box').children(':checkbox').prop('checked',$(this).is(':checked')?true:false);
});

//反选
$('#invertChecked').change(function(){
 if($(this).is(':checked')){
   $('#box').children(':checkbox').each(function(){
    $(this).prop('checked',$(this).is(':checked')?false:true);
   });
 }
});

//一键控制全选、反选、全不选
$('#orChecked').change(function(){
 if($(this).is(':checked')){
   var box = $('#box').children(':checkbox');
   if(box.length==box.filter(':not(:checked)').length){  // 复选框长度和没选中的个数一样 -> 全选 , .not(':checked').length 也可以。
   $('#box').children(':checkbox').prop('checked',true);
 }else{   // 如果有选中个数，-> 反选 
   $('#box').children(':checkbox').each(function(){   
    $(this).prop('checked',$(this).is(':checked')?false:true);
   });
 }else{
   $('#box').children(':checkbox').prop('checked',false);  // 如控制键取消选中，剩余的checkbox也取消选中
 }
  
});

 <p align="center">
     
   <p id="box">
     <input type="checkbox" value="1">西瓜
     <input type="checkbox" value="2">芒果
     <input type="checkbox" value="3">橙
     <input type="checkbox" value="4">山竹
     <input type="checkbox" value="5">草莓
     <input type="checkbox" value="6">火龙果
   </p>  
       
   <br>
       
   <input type="checkbox" id="allChecked">全选
   <input type="checkbox" id="invertChecked">反选
   <input type="checkbox" id="orChecked">全选/反选/全不选
       
 </p>

Related recommendations:

##JQuery-based checkbox selection problem analysis

Checkbox selection and inverse/cancel selection

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