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jquery limits the text box to only input numbers (integers and decimals)_jquery

WBOY
WBOYOriginal
2016-05-16 15:21:071139browse

The example in this article introduces the detailed code of jquery that restricts the text box to only input numbers. It is shared with everyone for your reference. The specific content is as follows

First, here is a jQuery code that stipulates that the text box can only enter numbers including decimals: 

<!DOCTYPE html> 
<html> 
<head> 
<meta charset="gb2312"> 
<title>脚本之家</title> 
<script type="text/javascript" src="mytest/jQuery/jquery-1.8.3.js"></script>
<script type="text/javascript">
//文本框只能输入数字(包括小数)，并屏蔽输入法和粘贴 
jQuery.fn.number=function(){
 this.bind("keypress",function(e){ 
 var code=(e.keyCode&#63;e.keyCode:e.which); //兼容火狐 IE 
 //火狐下不能使用退格键 
 if(!$.browser.msie&&(e.keyCode==0x8)){return;} 
 if(this.value.indexOf(".")==-1){return (code >= 48 && code<= 57)||(code==46);}
 else{return code >= 48 && code<= 57} 
 }); 
 this.bind("paste",function(){return false;}); 
 this.bind("keyup",function(){
 if(this.value.slice(0,1) == ".")
 { 
  this.value = ""; 
 } 
 }); 
 this.bind("blur",function(){ 
 if(this.value.slice(-1) == ".")
 { 
  this.value = this.value.slice(0,this.value.length-1); 
 } 
 }); 
}; 
$(function(){ 
 $("#txt").number();
}); 
</script>
</head>
<body>
<input type="text" id="txt" />
</body>
</html>

2. How jQuery stipulates that the text box can only enter integers:
Sometimes the content of the text box can only be numbers, and it can only be integers. For example, for age, you cannot fill in 20.8 years old. Here is a code example to introduce how to implement this function. I hope it will help friends in need. The code As follows:

<html> 
<head> 
<meta charset="gb2312"> 
<title>蚂蚁部落</title> 
<script type="text/javascript" src="mytest/jQuery/jquery-1.8.3.js"></script>
<script type="text/javascript">
//文本框只能输入数字(不包括小数)，并屏蔽输入法和粘贴 
jQuery.fn.integer=function(){ 
 this.bind("keypress",function(e){ 
 var code=(e.keyCode&#63;e.keyCode:e.which); //兼容火狐 IE 
 //火狐下不能使用退格键 
 if(!$.browser.msie&&(e.keyCode==0x8))
 { 
  return ; 
 } 
 return code >= 48 && code<= 57; 
 }); 
 this.bind("paste",function(){ 
 return false; 
 }); 
 this.bind("keyup",function(){ 
 if(/(^0+)/.test(this.value)) 
 { 
 this.value = this.value.replace(/^0*/,''); 
 } 
 }); 
}; 
$(function(){ 
 $("#txt").integer();
}); 
</script>
</head>
<body>
<input type="text" id="txt" />
</body>
</html>

The above code meets our requirements. Only integers can be entered in the text box.

I hope this article will be helpful to everyone learning jquery programming.

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