async/await of ES7 is one of my favorite proposals, that would for sure change the way we handle asynchronous code in JavaScript!
Promise Example
let p1 = () => {
return new Promise((resolve, reject) => {
setTimeout(() => {
resolve('Promise 1 ');
}, 30);
});
}
let p2 = () => {
return new Promise((resolve, reject) => {
setTimeout(() => {
resolve('Promise 2');
}, 10);
});
}
async function getVal() {
var res1 = await p1();
var res2 = await p2();
return res1 + res2;
}
(async function() {
var res = await getVal();
console.log(res); // Promise 1 Promise 2
}());
## File System Example
javascript
var lieFS = require('lie-fs'); // Promisified FS
(async function() {
var list = await fs.readdir('~/');
console.log(list);
}());
## Chain Animation (From the Spec)
javascript
async function chainAnimationsAsync(elem, animations) {
var ret = null;
try {
for (let anim in animations) {
ret = await anim(elem);
}
} catch(e) {
/* ignore and keep going */
}
return ret;
}
## Async Await Fetch
javascript
let data = await (await fetch(url)).json()
Do let me know if you have your own set, until then happy async/await!
#javascript#es7#async
About Hemanth HM
Hemanth HM is a Sr. Machine Learning Manager at PayPal, Google Developer Expert, TC39 delegate, FOSS advocate, and community leader with a passion for programming, AI, and open-source contributions.