JS retains two decimal places for input number verification code

This time I will bring you the JS retaining two decimal places input number verification code, JS retaining two decimal places input number verificationWhat are the precautions, the following is a practical case, let's take a look .

Input input format verification:

$(function(){ var data = $.trim($("#inputId").val()); //此正则表达式验证小数位是否超过两位，小数可为1位 || 2位 || 整数 if(!(/^\d+(\.\d{1,2})?$/.test(data ) || /^\d$/.test(data ) )){ alert("输入金额格式不对!最高精确到分"); return ; } //写入对应位置 $(".htmlTextClass").innerText(toDecimal2(data )); }); //强制小数位保留方法 function toDecimal2(x) { var f = parseFloat(x); //isNaN() 函数用于检查其参数是否是非数字值,如果 x 是特殊的非数字值 NaN（或者能被转换为这样的值），返回的值就是 true。如果 x 是其他值,则返回 false。 if (isNaN(f)) { return false; } var f = Math.round(x*100)/100; //round() 方法可把一个数字舍入为最接近的整数 var s = f.toString(); var rs = s.indexOf('.'); if (rs < 0) { rs = s.length; s += '.'; } while (s.length <= rs + 2) { s += '0'; } return s; }

Supplement: Let’s look at the solution to retain two decimal places in js

var a = 123.456; a = a..toFixed(2); alert(a);//结果：123.46

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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