Javascript Regex negative lookbehind Alternative

Question

Looks like it is not first question about look-behind, but I didn't find an answer.

Javascript has no (positive|negative)look-behind requests.

I need a regular expression that match *.scss file name, but didn't match the names like *.h.scss. With look-behind request is looks like:

/(?<!(\.h))\.scss$/

How can I do this in javascript? I need this regular expression for webpack rules "test" parameter, so the javascript regex required only.

Answer 1

You may use

/^(?!.*\.h\.scss$).*\.scss$/

See the regex demo

Details

• ^ - start of string anchor
• (?!.*\.h\.scss$) - a negative lookahead failing the match if the string ends with .h.scss
• .* - any 0+ chars as many as possible
• \.scss - a .scss substring at the...
• $ - end of the string.