How to write async/await in vanilla JS

user_8916964 0
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In the MDN Doc, it says

async function foo() { 
    await 1
}

is equivalent to:

function foo() {
    return Promise.resolve(1).then(() => undefined)
}

so what is the eqivalent of

async function foo() {
    await genPromise();
}

assuming that genPromise() returns another Promise.

Would it be

function foo() {
    return Promise.resolve(new Promise((resolve, reject) => {})).then(() => undefined)
}
promise async-await javascript
1 Answers

so what is the eqivalent of

async function foo() {
   await genPromise();
}

That code will wait for the promise returned by genPromise to resolve, and then will resolve its own promise to undefined. So the equivalent is:

function foo() {
  return genPromise().then(() => undefined);
}
user_37948120
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