Different versions of your site can be running at the same time
It's pretty easy for a user to be running an old version of your site. Not only that, but a user could be running many different versions of your site at the same time, in different tabs.
jakearchibald.com Jake Archibald
TypeScript 4.0 finally delivers what I’ve been waiting for
Microsoft announced the release candidate of TypeScript 4.0. And with that comes Labeled Tuple Elements, which is the answer to the title of this post. Here’s a contrived example. IQuery. It’s meant to describe the shape of functions that query things.
medium.com Nathaniel Kessler