A minimal deferred library that implemented in typescript

This deferred library can be used by es module, commonjs module and typescript module

Examples

Usage in es module, file with .mjs or .js extension

When .js extension used, the value of module property in package.json should be module.

import { Deferred } from '@esutils/deferred';

async function demo() {
  const defer = new Deferred();
  setTimeout(() => {
    defer.resolve();
  });
  console.log(`Start ${Date.now()}`);
  await defer.promise;
  console.log(`End ${Date.now()}`);
}

demo();

Usage in commonjs module, file with .cjs or .js extension

When .js extension used, the value of module property in package.json should be commonjs or not specified.

const { Deferred } = require('@esutils/deferred');

async function demo() {
  const defer = new Deferred();
  setTimeout(() => {
    defer.resolve();
  });
  console.log(`Start ${Date.now()}`);
  await defer.promise;
  console.log(`End ${Date.now()}`);
}

demo();

Usage in typescript module, file with .ts extension

import { Deferred } from '@esutils/deferred';

async function demo() {
  const defer = new Deferred<void>();
  setTimeout(() => {
    defer.resolve();
  });
  console.log(`Start ${Date.now()}`);
  await defer.promise;
  console.log(`End ${Date.now()}`);
}

demo();