Javascript正则表达式与异常匹配

Question

The input is an absolute path for example:

/usr/local/lib/node_modules/normalize
/usr/local/lib/node_modules/bobcat/index.js

I want to create a regex that matches EVERYTHING except when "bobcat" was found in the string:

This is what I got to match everything:

var pattern = /node_modules/g;
var matches = pattern.test(input);

How can I do this?

Answer 1

You can use a negative lookahead regex:

/node_modules(?!.*\/bobcat\/)/g

RegEx Demo

(?!.*\\/bobcat\\/) is negative lookahead that will fail the match if /bobcat/ comes after node_modules .

Answer 2

Make an if/else statement and check if /bobycat/ matches. Put your code in the else part.