Javascript 如何使用javascript转义正则表达式特殊字符？

How to escape regular expression special characters using javascript?

提问by Muneeswaran Balasubramanian

I need to escape the regular expression special characters using java script.How can i achieve this?Any help should be appreciated.

我需要使用 java 脚本转义正则表达式特殊字符。我怎样才能做到这一点？应该感谢任何帮助。

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Thanks for your quick reply.But i need to escape all the special characters of regular expression.I have try by this code,But i can't achieve the result.

感谢您的快速回复。但我需要转义正则表达式的所有特殊字符。我已经尝试过这段代码，但我无法达到结果。

RegExp.escape=function(str)
            {
                if (!arguments.callee.sRE) {
                    var specials = [
                        '/', '.', '*', '+', '?', '|',
                        '(', ')', '[', ']', '{', '}', '\'
                    ];
                    arguments.callee.sRE = new RegExp(
                    '(\' + specials.join('|\') + ')', 'gim'
                );
                }
                return str.replace(arguments.callee.sRE, '\');

            }

function regExpFind() {
            <%--var regex = new RegExp("\[munees\]","gim");--%>
                    var regex= new RegExp(RegExp.escape("[Munees]waran"));
                    <%--var regex=RegExp.escape`enter code here`("[Munees]waran");--%>
                    alert("Reg : "+regex);
                }

What i am wrong with this code?Please guide me.

这段代码有什么问题？请指导我。

回答by Mathias Bynens

Use the \character to escape a character that has special meaning inside a regular expression.

使用\字符来转义在正则表达式中具有特殊含义的字符。

To automate it, you could use this:

要自动化它，你可以使用这个：

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

Update:There is now a proposal to standardize this method, possibly in ES2016: https://github.com/benjamingr/RegExp.escape

更新：现在有一个标准化这个方法的提议，可能在 ES2016 中：https: //github.com/benjamingr/RegExp.escape

Update: The abovementioned proposal was rejected, so keep implementing this yourself if you need it.

更新：上述提议已被拒绝，因此如果您需要，请继续自己实施。

回答by Ben Rowe

Use the backslash to escape a character. For example:

使用反斜杠转义字符。例如：

/\d/

This will match \d instead of a numeric character

这将匹配 \d 而不是数字字符

回答by Claudio Redi

With \you escape special characters

和\你一起转义特殊字符

Escapes special characters to literal and literal characters to special.

E.g: /\(s\)/matches '(s)' while /(\s)/matches any whitespace and captures the match.

将特殊字符转义为文字，将文字字符转义为特殊字符。

例如：/\(s\)/匹配 '(s)' 而/(\s)/匹配任何空格并捕获匹配。

Source: http://www.javascriptkit.com/javatutors/redev2.shtml

来源：http: //www.javascriptkit.com/javatutors/redev2.shtml