Source @ github

Promise.then

then — A callback for a resolved Promise. Will execute as soon as the promise is resolved. If the promise is already resolved, it will execute instantly.

Description

Promise.then([mixed result])

Parameters

Name Description Type Default Optional
result The result from the resolve function in the promise. mixed Yes

Changelog

Version Description
ES 6 Introduced.

Examples

Example #1 – Nested example
new Promise(resolve => {
	resolve('resolved! :)');
}).then(result => {
	console.log(result);
});
Example #2 – Hook example
let mypromise = new Promise(resolve => {
	resolve('resolved! :)');
});

mypromise.then(result => {
	console.log(result);
});
Example #3 – Resolve after 1 second.
let mypromise = new Promise(resolve => {
	setTimeout(() => {
		resolve('resolved! :)');
	}, 1000);
});

mypromise.then(result => {
	console.log(result);
});

console.log('Waiting…');
Example #4 – Bind hook 1 second after the promise has already been resolved
let mypromise = new Promise(resolve => {
	resolve('resolved! :)');
});

setTimeout(() => {
	mypromise.then(result => {
		console.log(result);
	});
}, 1000);

console.log('Waiting…');

External references