jQuery gets the selected value of checkbox

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jQuery gets the selected value of checkbox_jquery

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May 16, 2016 pm 03:17 PM

1. Problem background

There are several multi-select boxes, select a few of them and get the selected value

2. The design results are shown in the figure below:

3. Design source code

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>jQuery获取checkbox选中的值</title> 
<script type="text/javascript" src="jquery-2.2.0.js"></script> 
<script type="text/javascript"> 
$(function(){ 
$("input[name='ckb']:checkbox").click(function() { 
var str = ""; 
$("input[name='ckb']:checkbox").each(function() { 
if($(this).is(":checked")) 
{ 
str += $(this).attr("value")+","; 
} 
}); 
if(str != null && str.length > 1) 
{ 
str = str.substring(0,str.length-1); 
} 
alert(str); 
}); 
}); 
</script> 
</head> 
<body> 
<input type="checkbox" name="ckb" value="1"/>苹果 
<input type="checkbox" name="ckb" value="2"/>橘子 
<input type="checkbox" name="ckb" value="3"/>梨子 
<input type="checkbox" name="ckb" value="4"/>香蕉 
</body> 
</html>

Let me share with you a piece of code about how jQuery operates CheckBox (select, cancel, value)

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> 
<HTML> 
<HEAD> 
<TITLE> New document．nbsp;</TITLE> 
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> 
<SCRIPT LANGUAGE="javascript" src="http://www.cnjquery.com/demo/jquery.js"></script> 
<SCRIPT LANGUAGE="javascript"> 
<!-- 
$("document．quot;).ready(function(){ 
$("#btn1").click(function(){ 
$("[name='checkbox']").attr("checked",'true');//全选 
}) 
$("#btn2").click(function(){ 
$("[name='checkbox']").removeAttr("checked");//取消全选 
}) 
$("#btn3").click(function(){ 
$("[name='checkbox']:even").attr("checked",'true');//选中所有奇数 
}) 
$("#btn4").click(function(){ 
$("[name='checkbox']").each(function(){ 
if($(this).attr("checked")) 
{ 
$(this).removeAttr("checked"); 
} 
else 
{ 
$(this).attr("checked",'true'); 
} 
}) 
}) 
$("#btn5").click(function(){ 
var str=""; 
$("[name='checkbox'][checked]").each(function(){ 
str+=$(this).val()+""r"n"; 
//alert($(this).val()); 
}) 
alert(str); 
}) 
}) 
//--> 
</SCRIPT> 
</HEAD> 
<BODY> 
<form name="form1" method="post" action=""> 
<input type="button" id="btn1" value="全选"> 
<input type="button" id="btn2" value="取消全选"> 
<input type="button" id="btn3" value="选中所有奇数"> 
<input type="button" id="btn4" value="反选"> 
<input type="button" id="btn5" value="获得选中的所有值"> 
<br> 
<input type="checkbox" name="checkbox" value="checkbox1"> 
checkbox1 
<input type="checkbox" name="checkbox" value="checkbox2"> 
checkbox2 
<input type="checkbox" name="checkbox" value="checkbox3"> 
checkbox3 
<input type="checkbox" name="checkbox" value="checkbox4"> 
checkbox4 
<input type="checkbox" name="checkbox" value="checkbox5"> 
checkbox5 
<input type="checkbox" name="checkbox" value="checkbox6"> 
checkbox6 
<input type="checkbox" name="checkbox" value="checkbox7"> 
checkbox7 
<input type="checkbox" name="checkbox" value="checkbox8"> 
checkbox8 
</form>

The above is the jQuery that the editor shared with you to get the selected value of the checkbox. I hope it will be helpful to everyone.

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