Negative lookahead Regular Expression

Question

I want to match all strings ending in \".htm\" unless it ends in \"foo.htm\". I\'m generally decent with regular expressions, but negative lookaheads have me stumped. Why

Answer 1

Like Renesis mentioned, "lookbehind" is not supported in JavaScript, so maybe just use two regexps in combination:

!/foo\.htm$/i.test(teststring) && /\.htm$/i.test(teststring)