Regular Expressions 101 – regex visualiser and debugger

To celebrate optional chaining making it to stage 4, I created this regex to find places you can use it in your codebase

Online Regex tester and debugger for multiple languages - One of my favourite sites!

I know it's ridiculous, but I just made a regex in PCRE to match "A B C" where A+B=C. This hasn't been done before, so I just wanted to share it

Regex 101

Online regex tester and debugger

RegEx101 has been growing steadily over the years, and today I finally added a long wanted feature: unit tests