Match everything except for specified strings

Question

I know that the following regex will match \"red\", \"green\", or \"blue\".

red|green|blue

Is there a straightforward way of making it mat

Answer 1

You don't need negative lookahead. There is working example:

/([\s\S]*?)(red|green|blue|)/g

Description:

• [\s\S] - match any character
• * - match from 0 to unlimited from previous group
• ? - match as less as possible
• (red|green|blue|) - match one of this words or nothing
• g - repeat pattern

Example:

whiteredwhiteredgreenbluewhiteredgreenbluewhiteredgreenbluewhiteredgreenbluewhiteredgreenbluewhiteredgreenbluewhiteredgreenbluewhiteredwhiteredwhiteredwhiteredwhiteredwhiteredgreenbluewhiteredwhiteredwhiteredwhiteredwhiteredredgreenredgreenredgreenredgreenredgreenbluewhiteredbluewhiteredbluewhiteredbluewhiteredbluewhiteredwhite

Will be:

whitewhitewhitewhitewhitewhitewhitewhitewhitewhitewhitewhitewhitewhitewhitewhitewhitewhitewhitewhitewhitewhitewhitewhitewhite

Test it: regex101.com