试试这个
function(){
var a = this.value*100;
var b = Math.floor(a)/100
return b;}
效果
--------------------调整一下
var a = this.value*10000;
var b = Math.floor(a)/100;
return b+"%";}
let a=1.254;
let b=a.toString();
let c=b.indexOf(".");
alert(b.substr(0,c+3));
类似这样。直接截取。你看看。