javascript - Does regular expression in js support conditional matching?
为情所困2017-05-19 10:40:26
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?(子表达式)需要执行的表达式
例：(abc)2333(?(1)\w)
Only when the subexpression matches successfully, the following expression will be matched. Does js support this writing method? If you try it, an error will be reported directly.
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Unfortunately, Javascript is not supported currently. C#, php, python, etc. all support this advanced syntax.