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regexperl

Regex for any string not ending on .js

This has been driving me nuts. I'm trying to match everything that doesn't end in .js. I'm using perl, so ?<! etc. is more than welcome.

What I'm trying to do:

Do match these

mainfile
jquery.1.1.11
my.module

Do NOT match these

mainfile.js
jquery.1.1.11.js
my.module.js

This should be an insanely simple task, but I'm just stuck. I looked in the docs for both regex, sed, perl and was even fiddling around for half an hour on regexr. Intuitively, this example (/^.*?(?!\.js)$/) should do it. I guess I just stared myself blind.

Thanks in advance.

Solution

  • You can use this regex to make sure your match doesn't end with .js:

    ^(?!.+\.js$).+$

    RegEx Demo

    (?!.+\.js$) is a negative lookahead condition to fail the match if line has .js at the end.