如何替换 JavaScript 中所有出现的字符串 [英] How to replace all occurrences of a string in JavaScript

问题描述

我的 JavaScript 代码中有这个字符串:

I have this string in my JavaScript code:

"Test abc test test abc test test test abc test test abc"

正在做:

str = str.replace('abc', '');

似乎只删除了上面字符串中第一次出现的 abc.

Seems to only remove the first occurrence of abc in the string above.

如何替换所有出现的它?

推荐答案

更新: 在最流行的浏览器的最新版本中，您可以使用 replaceAll如图所示:

Update: In the latest versions of most popular browsers, you can use replaceAll as shown here:

let result = "1 abc 2 abc 3".replaceAll("abc", "xyz");
// `result` is "1 xyz 2 xyz 3"

但请先检查我可以使用或其他兼容性表，以确保您的目标浏览器首先添加了对它的支持.

But check Can I use or another compatibility table first to make sure the browsers you're targeting have added support for it first.

对于 Node 和与旧/非当前浏览器的兼容性:

For Node and compatibility with older/non-current browsers:

注意:不要在性能关键代码中使用以下解决方案.

作为简单文字字符串的正则表达式的替代方案，您可以使用

As an alternative to regular expressions for a simple literal string, you could use

str = "Test abc test test abc test...".split("abc").join("");

一般的模式是

str.split(search).join(replacement)

在某些情况下，这曾经比使用 replaceAll 和正则表达式更快，但在现代浏览器中似乎不再如此.

This used to be faster in some cases than using replaceAll and a regular expression, but that doesn't seem to be the case anymore in modern browsers.

基准:https://jsben.ch/TZYzj

结论:如果您有一个性能关键的用例(例如处理数百个字符串)，请使用 Regexp 方法.但对于大多数典型用例，这完全值得不必担心特殊字符.

Conclusion: If you have a performance critical use case (e.g processing hundreds of strings), use the Regexp method. But for most typical use cases, this is well worth not having to worry about special characters.

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