javascript - Javascript中是否存在RegExp.escape函数？(Is there a RegExp.escape function in Javascript?)

Question

I just want to create a regular expression out of any possible string.(我只想从任何可能的字符串中创建一个正则表达式。)

var usersString = "Hello?!*`~World()[]"; var expression = new RegExp(RegExp.escape(usersString)) var matches = "Hello".match(expression); Is there a built in method for that?(有内置的方法吗？) If not, what do people use?(如果没有，人们会使用什么？) Ruby has RegExp.escape .(Ruby具有RegExp.escape 。) I don't feel like I'd need to write my own, there's gotta be something standard out there.(我觉得我不需要自己写东西，那里肯定有一些标准。) Thanks!(谢谢！)   ask by Lance Pollard translate from so

Answer 1

The function linked above is insufficient.(上面链接的功能不足。)

It fails to escape ^ or $ (start and end of string), or - , which in a character group is used for ranges.(它无法转义^或$ （字符串的开头和结尾）或- ，这在字符组中用于范围。) Use this function:(使用此功能：) RegExp.escape= function(s) { return s.replace(/[-/\^$*+?.()|[]{}]/g, '\$&'); }; While it may seem unnecessary at first glance, escaping - (as well as ^ ) makes the function suitable for escaping characters to be inserted into a character class as well as the body of the regex.(乍看起来似乎没有必要，但转义- （以及^ ）使该函数适合于转义要插入字符类和正则表达式主体的字符。) Escaping / makes the function suitable for escaping characters to be used in a JS regex literal for later eval.(转义/使该函数适合转义要在JS regex文字中使用的字符，以供以后评估。) As there is no downside to escaping either of them it makes sense to escape to cover wider use cases.(由于逃避任何一个都没有不利之处，因此有理由逃避以涵盖更广泛的用例。) And yes, it is a disappointing failing that this is not part of standard JavaScript.(是的，如果它不是标准JavaScript的一部分，这是令人失望的。)