如何使用javascript转义正则表达式特殊字符？ [英] How to escape regular expression special characters using javascript?

问题描述

我需要使用java脚本来转义正则表达式特殊字符。我如何实现这一点？任何帮助都应该被理解。

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

感谢您的快速回复。但我需要逃避正则表达式的所有特殊字符。我已尝试使用此代码，但我无法达到结果。

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.

RegExp.escape=function(str)
            {
                if (!arguments.callee.sRE) {
                    var specials = [
                        '/', '.', '*', '+', '?', '|',
                        '(', ')', '[', ']', '{', '}', '\\'
                    ];
                    arguments.callee.sRE = new RegExp(
                    '(\\' + specials.join('|\\') + ')', 'gim'
                );
                }
                return str.replace(arguments.callee.sRE, '\\$1');

            }

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);
                }

这段代码我错了什么？请指导我。

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

推荐答案

使用 \ 字符来转义在常规字符内具有特殊含义的字符表达。

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

要自动化它，你可以使用它：

To automate it, you could use this:

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

更新：现在有一项标准化提案这种方法，可能在ES2016中： https://github.com/benjamingr/RegExp.escape

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

更新：上述提案遭到拒绝，因此如果您需要，请继续自行实施。

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

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