JS format number retaining two decimal points sample code_javascript skills

Question: Multiple ways to format data in JS with functions retaining two decimal places

The best way:

It seems like this is how we keep two people

Copy code The code is as follows:

var a = 9.39393;
alert(a.toFixed(2));

Description:

alert(Number.toFixed(9.39393));

The returned value is 9.39
But only versions above ie5.5 are supported.

Other methods:

function roundFun(numberRound,roundDigit) //四舍五入，保留位数为roundDigit  
 { 
 if (numberRound>=0) 
 { 
 var tempNumber = parseInt((numberRound * Math.pow(10,roundDigit)+0.5))/Math.pow(10,roundDigit); 
 return tempNumber; 
 } 
 else  
 { 
 numberRound1=-numberRound 
 var tempNumber = parseInt((numberRound1 * Math.pow(10,roundDigit)+0.5))/Math.pow(10,roundDigit); 
 return -tempNumber; 
 } 
}

Method 2:

<script> 
 tmp = "1234567.57232" 
 result = tmp.substr(0,tmp.indexOf(".")+3); 
 alert(result); 
 </script> 

Method 3:

Copy code The code is as follows:

var a=3.1415926;
a = a.toFixed(2);//Reserve 2 bits but the result is a String type
a = parseFloat(a);//Convert the result to float
//The words in one step are as follows
a = parseFloat(a.toFixed(2));