禁用不必要的转义字符：\ / no-useless-escape [英] Disable Unnecessary escape character: \/ no-useless-escape

问题描述

我有我的这个正则表达式，它将检查字符串是否包含链接或URL （即https://eslint.org/docs/rules/no-useless-escape）。使用此正则表达式 /（\b（https？| ftp | file）：\ / \ / [-A-Z0-9 +& @＃\ /％？=〜_ | ！：，。;] * [-A-Z0-9 +& @＃\ /％=〜_ |]）/ ig ，在运行测试用例时遇到错误对不必要的转义字符\ / no-useless-escape 做出反应。如何禁用此错误，以便我继续测试用例并使用正则表达式。

I have this regex of mine that will check the string if it contains link or url (i.e. https://eslint.org/docs/rules/no-useless-escape). Using this regex /(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/ig, I've encountered and error while running my test cases in react about Unnecessary escape character: \/ no-useless-escape. How to disable this eslint-error in order for me to proceed with my test case and use the regex.

感谢您的帮助！

推荐答案

这是中的 + / [-A-Z0-9 + & @＃\ /％？=〜_ |！：，。;] 和 [-A-Z0-9 +& @＃\ /％= 〜_ |] （不是：\ / \ / 中的那些）。大多数字符不必在字符类（方括号）内转义。这应该等效： /（\b（https？| ftp | file）：\ / \ / [-A-Z0-9 +& @＃/％？=〜_ | ！：，。;] * [-A-Z0-9 +& @＃/％=〜_ |]）/ ig 所以
参见 https://www.regular-expressions.info/charclass.html 了解更多信息，但相关部分：

It's the \/ in [-A-Z0-9+&@#\/%?=~_|!:,.;] and [-A-Z0-9+&@#\/%=~_|] (NOT the ones in :\/\/). Most characters do not have to be escaped within a character class (square brackets). This should be equivalent: /(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#/%?=~_|!:,.;]*[-A-Z0-9+&@#/%=~_|])/ig So See https://www.regular-expressions.info/charclass.html for more info, but the relevant part:

在大多数正则表达式中，字符类中唯一的特殊字符或元字符
是右括号[]，反斜杠\，
尖号^和连字符-。通常的元字符是字符类中的常规
字符，不需要通过
反斜杠进行转义。要搜索星号或加号，请使用[+ *]。如果您转义字符
类中的常规元字符，则您的正则表达式将可以正常工作，但这样做会大大降低可读性。

In most regex flavors, the only special characters or metacharacters inside a character class are the closing bracket ], the backslash \, the caret ^, and the hyphen -. The usual metacharacters are normal characters inside a character class, and do not need to be escaped by a backslash. To search for a star or plus, use [+*]. Your regex will work fine if you escape the regular metacharacters inside a character class, but doing so significantly reduces readability.

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