🚛 WTF is meta.main?

Run code in context with meta.main

Meta Main Example

main.ts

export function helloWorld() {
  console.log('Main?', import.meta.main)
  return "Hi Mom!"
}

if (import.meta.main) {
  console.log(helloWorld());
}

Import the function in a different file:

lib.ts

import { helloWorld } from './main'
helloWorld()

If you run the main file, the value is logged in side meta.main

command line

deno run main.ts

But if you run the lib file, it will NOT run the code inside meta.main

command line

deno run lib.ts