blink/tutorials/delay.js

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/*
The built-in function setTimeout uses callbacks. Create a promise-based alternative.
The function delay(ms) should return a promise. That promise should resolve after ms milliseconds, so that we can add .then to it, like this:
*/
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function delay (ms) {
return new Promise(resolve => {
setTimeout(resolve, ms);
});
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}
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delay(1000).then(() => console.log('Hello world!'));