javascript - Does regular expression in js support conditional matching?

Question

?(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.

Answer 1

Unfortunately, Javascript is not supported currently. C#, php, python, etc. all support this advanced syntax.