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What is the meaning of these extentions? What are these extensions used for? When I look into a simple project & I see these extentions as in the attached image:(.config.js | .d.ts | .server.js)

a snapshot of these extentions

jonrsharpe
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aFong
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    https://stackoverflow.com/q/21247278/3001761, and config is short for "configuration" (the actual extensions are just .ts - TypeScript and .js - JavaScript). – jonrsharpe Nov 28 '21 at 08:58
  • thank you so much jonrsharpe, one last question i still dont understand why we have to use typescript in nodejs & javascript project? – aFong Nov 28 '21 at 12:27
  • You don't have to. But those types can be used by e.g. IDEs to help autocompletion. – jonrsharpe Nov 28 '21 at 12:36

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