node js request async await
function doRequest(url) {
return new Promise(function (resolve, reject) {
request(url, function (error, res, body) {
if (!error && res.statusCode == 200) {
resolve(body);
} else {
reject(error);
}
});
});
}
// Usage:
async function main() {
let res = await doRequest(url);
console.log(res);
}
main();javascript async function
// Old School Javascript Invoke
(async function() {
await someAsyncFunction();
})();
//New ES6 Javascript Invoke
(async () => {
await someAsyncFunction();
})();async awiat
const data = async () => {
const got = await fetch('https://jsonplaceholder.typicode.com/todos/1');
console.log(await got.json())
}
data();async await
async function showAvatar() {
// read our JSON
let response = await fetch('/article/promise-chaining/user.json');
let user = await response.json();
// read github user
let githubResponse = await fetch(`https://api.github.com/users/${user.name}`);
let githubUser = await githubResponse.json();
// show the avatar
let img = document.createElement('img');
img.src = githubUser.avatar_url;
img.className = "promise-avatar-example";
document.body.append(img);
// wait 3 seconds
await new Promise((resolve, reject) => setTimeout(resolve, 3000));
img.remove();
return githubUser;
}
showAvatar();how to make an async function
function resolveAfter2Seconds() {
return new Promise(resolve => {
setTimeout(() => {
resolve('resolved');
}, 2000);
});
}
//async function:
async function asyncCall() {
console.log('calling');
const result = await resolveAfter2Seconds();
console.log(result);
// expected output: 'resolved'
}
asyncCall();javascript async script
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