TS2794

error TS2794: Expected 1 arguments, but got 0. Did you forget to include ‘void‘ in your type argument to ‘Promise‘?

Broken Code ❌

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await new Promise((resolve, reject) => {
  resolve();
});

Fixed Code ✔️

When a Promise resolves with nothing, you need to define that as a type argument to the generic Promise:

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await new Promise<void>((resolve, reject) => {
  resolve();
});