如何动态添加javascript正则表达式转义字符 [英] How to add a javascript regular expression escape character dynamically

问题描述

我有一行代码如下

if($('#eqInputBox').val().search( $(this).html() ) == -1)

应该检查哪个看到html已经在eqInputBox中了 - 问题是，有时 $（this）.html（）中的字符可以是'+ '或'*'。任何其他角色（在应用程序的可能字符集中）都有效，但是当这些角色出现时，正则表达式不会返回任何值 - 我想这可能是因为我无法使用 \ 要转义这些字符的字符。

Which is supposed to check to see the html is already in the eqInputBox or not - problem is, sometimes the character in $(this).html() can be a '+' or a '*'. Any other character (in the set of possible characters for the app) works, but when these characters show up, the regular expression doesn't return any value - I think this might be because I can't slip a \ character in to escape these characters.

任何人对于（此）html字符<$ c时的方式有任何想法$ c> + 或 * ，我还能正常检查吗？

Anyone have any ideas on how, when the (this) html character is + or *, I can still make it check normally?

编辑：

$(this).html()

是用户生成的 div ，所以我不能简单地手动放置转义字符。如果有必要，我该如何动态添加？

is a user generated div, so I cannot simply put the escape character in manually. How would I go about dynamically adding it when it is necessary?

推荐答案

你必须模拟 quotemeta ，请查看转义正则表达式

RegExp.escape = function(text) {
    return text.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
}

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