javascript - 在 String.prototype.replace 使用的字符串中转义美元符号的更好方法 [英] javascript - Better Way to Escape Dollar Signs in the String Used By String.prototype.replace

问题描述

我想用另一个字符串替换一个字符串.我发现当 replaceValue 包含 "$" 时，替换将失败.所以我试图首先通过 "$$" 转义 "$" .代码如下:

I want to replace a string by another. I found when the replaceValue contains "$", the replace will fail. So I am trying to escape "$" by "$$" first. The code is looks like this:

var str = ..., reg = ...;
function replaceString(replaceValue) {
  str.replace(reg, replaceValue.replace(/$/g, '$$$$'));
}

但我觉得它很丑，因为我需要写 4 个美元符号.

But I think it is ugly since I need to write 4 dollar signs.

还有其他角色需要我逃脱吗?有没有更好的方法来做到这一点?

Is there any other charactors that I need to escape? And is there any better way to do this?

推荐答案

有一种调用 replace 的方法，让我们不用担心逃避任何事情.

There is a way to call replace that allows us not to worry about escaping anything.

var str = ..., reg = ...;
function replaceString(replaceValue) {
  return str.replace(reg, function () { return replaceValue });
}

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