I didn't know, but I learned it - and you could learn it too ...
A little known ESLint plugin helps deal with aging codebase.
A quick memo post for when you need to kill a process, knowing its port.
Recently I fought - and at the end succeded - to configure two different set of SSH keys for different GitHub account on the same computer.
... more than with Promise, it has to do with core-js Promise polyfill, MutationObserver and IE11. No more spoilers.