让 IE 用文字字符串“$0”替换正则表达式

发布于 2024-11-07 23:59:34 字数 362 浏览 0 评论 0原文

我正在用美元金额替换正则表达式中的一堆值。问题是，在 IE 中，如果我尝试替换为一定数量的 $0 （或者理论上，$1--$9），替换永远不会发生，因为它试图替换一个不存在的组：

'foo'.replace(/f/g, '$0');

我希望替换的结果是“$0oo”，它在 Chrome & 中。 FF，但不是IE9（没有尝试过其他版本的IE）。

铬和FF 有以下“问题”，因为我不知道如何用文字 $1 替换：

'foo'.replace(/(f)/g, '$1')

原文

I'm replacing a bunch of values in a regex with dollar amounts. The problem is that in IE, if I attempt to replace with an amount of $0 (or, theoretically, $1--$9), the replace never occurs since the it's trying to replace a non-existant group:

'foo'.replace(/f/g, '$0');

I want the result of that replacement to be "$0oo", which it is in Chrome & FF, but not IE9 (haven't tried other versions of IE).

Chrome & FF have an "issue" with the following, in that I can't figure out how to replace with a literal $1:

'foo'.replace(/(f)/g, '$1')

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余厌 2024-11-14 23:59:34

写入 "$$0" 来转义 $ 符号。

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開玄 2024-11-14 23:59:34

在 Chrome 和 Firefox 中，您可以通过使用函数作为替换函数的第二个参数来解决此限制：

'foo'.replace(/(f)/g, function(){return '$1';}); // => $1oo

我自己的测试表明，IE8 在这个问题上与其他浏览器是一致的。

In Chrome and Firefox you can workaround this limitation by using a function as the second argument of the replace function:

'foo'.replace(/(f)/g, function(){return '$1';}); // => $1oo

My own testing shows that IE8 is consistent with the other browsers on this issue.

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穿透光 2024-11-14 23:59:34

问题：

'My Bank balance is {0} '.replace(/\{0\}/,'$0.22')
 results: "My Bank balance is {0}.22 " 
 This is not what we want

解决方案：

'My Bank balance is {0} '.replace(/\{0\}/,'$0.22')
results: "My Bank balance is $0.22 " 
'My Bank balance is {0} '.replace(/\{0\}/,"$0.22".replace(/\$/,'$$'))
result: "My Bank balance is $0.22 "

说明：我正在尝试查找“$”并替换为“$$”。要匹配“$”，您必须通过“\$”对其进行转义，要替换“$$$$”，您必须放置四个“$”作为“$$”的正则表达式转义“$”。乐趣！！

The Problem:

'My Bank balance is {0} '.replace(/\{0\}/,'$0.22')
 results: "My Bank balance is {0}.22 " 
 This is not what we want

The solution:

'My Bank balance is {0} '.replace(/\{0\}/,'$0.22')
results: "My Bank balance is $0.22 " 
'My Bank balance is {0} '.replace(/\{0\}/,"$0.22".replace(/\$/,'$$'))
result: "My Bank balance is $0.22 "

Explanation: I am trying to find '$' and replace by '$$'. To match '$' you have to escape it by '\$' and to replace '$$$$' you have to put four '$' as RegEx escape '$' for '$$'. Fun!!

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