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.ts comes from TypeScript, which is just JavaScript but with compile-time-checked types (and some other goodies) added on top. TS is really popular now, I don't

by XCSme 7y ago

.ts comes from TypeScript, which is just JavaScript but with compile-time-checked types (and some other goodies) added on top. TS is really popular now, I don't think any sane dev would start a new project today in plain JS instead of TS.

chrisco255 7y ago
That's huge hyperbole there. Plenty of projects are started in JS today. It's still wise to provide typings to your user base if you're publishing a library, whether or not you're using TS under the hood.
- arcticbull 7y ago
  I agree with parent that while people will still start JS projects today they'd probably be better off with TS.