Detailed explanation of JS removal of all commas in string

小云云
Release: 2018-01-09 13:31:51
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本文主要介绍了JS去掉字符串中所有的逗号,需要的朋友可以参考下,希望能帮助到大家。

1、去掉所有字符串里面所有的逗号,eg:123,111,222.00——123111222.00

function clear(str) { str = str.replace(/,/g, "");//取消字符串中出现的所有逗号 return str; }
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2、判断不是数字的

isNaN 函数

isNaN(expression:Object) : Boolean

计算参数,如果值为 NaN(非数字),则返回 true。此函数可用于检查一个数学表达式是否成功地计算为一个数字。

可用性:Flash Player 5;ActionScript 1.0

参数

expression:Object - 要计算的布尔值、变量或其它表达式。

返回

Boolean - 一个布尔值。

例子:

if(isNaN(document.login.imgcode.value)){ alert('验证码必须是数字!') document.login.imgcode.focus(); return false; }
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3、replaceAll

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PS:js去除字符串中所有 和&等特殊符号

var a="今天是星期五, 明天又可以放假了&好好休|息一下"; var converter = document.createElement("p"); converter.innerHTML = a; var b = converter.innerText; converter = null; var c=b.replace(/[&\|\\\*^%$#@\-]/g,""); alert(c);
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js字符串中含有数字与特殊字符应该如何判断?

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