regex.guide
regex.guide copied to clipboard
Add the “negated lookbehind” match
Do you want to request a feature or report a bug? Feature.
What is the expected behavior?
As a user, I want to be able to use the “negated lookbehind”, written (?<!y)x
, to match 'x' only if 'x' is not preceded by 'y'. More info at https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions#special-negative-lookbehind.
I would like to attempt this.