Based on the following demo, you can probably understand
Demo:
<html>
<head>
<script src='jquery-1.9.'></script>
<script>
= function(){
var dom_a = ('a1');
var dom_b = ("b1");
//alert("A="+dom_a.value+" || B="+dom_b.value);
}
//The following starts the operation of radio cancel and check //Native js operation function fn1(){
var dom_a = ('a1');
var dom_b = ("b1");
//Tick dom_a.checked = true;
//dom_a.checked = 'false';
//dom_a.checked = 123;
//Uncheck dom_b.checked = '';
//dom_b.checked = false;//Uncheck //dom_b.checked = null;//Uncheck //dom_b.checked = undefined;//Uncheck
}
//Use jQuery operation function fn2(){
var jQ_a = $('#a2');
var jQ_b = $("#b2");
//Tick jQ_a.prop('checked','abc');
//jQ_a.prop('checked','123');
//jQ_a.prop('checked','true');
//jQ_a.prop('checked',true);
//jQ_a.prop('checked',123);//The number can //jQ_a.prop('checked',-1);
//jQ_a.prop('checked',abc);//An error will be reported, abc is not defined {so predict that checked can be selected as long as there is a defined value (undefined means undefined)} //Uncheck jQ_b.prop('checked','');
//jQ_b.prop('checked',false);
//jQ_b.prop('checked',null);
//jQ_b.prop('checked',undefined);//No effect, no error will be reported; }
</script>
<style>
.own{
border:solid 2px red;
padding:20px 5px 20px 40px;
width:300px;
margin:80 0 0 500;
}
</style>
<head>
<body>
<!--
Through experiments, we learned：
Initialize the radio box to select4This method can be achieved：
1、checked
2、checked='checked'(This method is recommended，This method can have good compatibility with the browser)
3、checked='true'
4、checked=true
Tips：By givingcheckedAttribute copy,if onlycheckedexist,
Assign any value to initialize the selection(eg:checked='aaa' or checked='false')
Initialization selection can be achieved without assignment
Test success stories：
[checked],[checked='checked'],[checked='true'],[checked=true],[checked='aaa'],[checked='false'],
[checked='undefined'],[checked=false],[checked=null],[checked=undefined],[checked=''],[checked='-1']
When multiple are selected，The last radio box selected is the last one
-->
<div class='own'>
<label>A1</label><input id='a1' type='radio' value='1' name='test1' checked />
<label>B1</label><input id='b1' type='radio' value='2' name='test1' checked='checked'/>
<label>C1</label><input id='c1' type='radio' value='3' name='test1' checked='true' />
<label>D1</label><input id='d1' type='radio' value='4' name='test1' checked=true />
<button onclick='fn1()'>Test click</button>
</div>
<div class='own'>
<label>A2</label><input id='a2' type='radio' value='1' name='test2' />
<label>B2</label><input id='b2' type='radio' value='2' name='test2' checked/>
<label>C2</label><input id='c2' type='radio' value='3' name='test2' />
<label>D2</label><input id='d2' type='radio' value='4' name='test2' />
<button onclick='fn2()'>Test click</button>
</div>
</body>
</html>
The above article uses native js and jQuery to check and cancel the check and cancel the radio box operation is all the content I share with you. I hope you can give you a reference and I hope you can support me more.