数字格式字符串转数字保留后面0

    <script>
getCaption('3.4000');
function getCaption(str){
    var index=str.lastIndexOf(".");
    var num=str.substring(index+1,str.length).length;
    var res=Number(str).toFixed(num);
     alert(res); 
}
    </script>

 

转载于:https://www.cnblogs.com/stubborn-donkey/p/9957825.html