正则表达式检查字符串是否只包含数字 [英] Regex to check whether a string contains only numbers

问题描述

hash = window.location.hash.substr(1);
var reg = new RegExp('^[0-9]$');
console.log(reg.test(hash));

我在123上都是假的和123f。我想检查散列是否只包含数字。我错过了什么吗？

I get false on both "123" and "123f". I would like to check if the hash only contains numbers. Did I miss something?

推荐答案

var reg = /^\d+$/;

应该这样做。原文匹配任何由一位数组成的内容。

should do it. The original matches anything that consists of exactly one digit.

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