Javascript正则表达式，替换数字以外的所有字符 [英] Javascript regex, replace all characters other than numbers

问题描述

我想使用Javascript替换字符串中除0-9以外的所有字符.

I would like to replace all the characters other than 0-9 in a string, using Javascript.

为什么此正则表达式不起作用?

Why would this regex not work ?

 "a100.dfwe".replace(/([^0-9])+/i, "")

推荐答案

您需要使用/g 修饰符替换每次出现的情况:

You need the /g modifier to replace every occurrence:

"a100.dfwe".replace(/[^0-9]+/g, "");

我还为您删除了多余的 i 修饰符和未使用的捕获子表达式大括号.正如其他人指出的那样，您还可以使用 \ D 来进一步缩短它:

I also removed the redundant i modifier and the unused capturing sub-expression braces for you. As others have pointed out, you can also use \D to shorten it even further:

"a100.dfwe".replace(/\D+/g, "");

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