PCRE and Python regex not working in javascript

Question

This regex, /\[([^]]+)\]\((((?:https?|ftp):\/\/)?.*?)\)/gm, works fine in PCRE and Python, but not so much in javascript.

Why not? How do I fix it?

falsetru · Accepted Answer · 2014-02-26 06:03:10Z

1

Escaping ] inside [...] will make it work in Javascript:

\[([^\]]+)\]\((((?:https?|ftp):\/\/)?.*?)\)
     ^^

answered Feb 26, 2014 at 6:03

falsetru

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2 Comments

Justin808 Over a year ago

Interesting, is Javascript just more picky or is there a reason the designers chose the need for escaping?

falsetru Over a year ago

@Justin808, I don't know the reason behind. Some regular expression engines are smart enough to handle that, others are not. For another example: Some regular expression complain about {abc}, others don't complain and just match {abc} literally.

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