nodejs promise async
// server.js
function square(x) {
return new Promise(resolve => {
setTimeout(() => {
resolve(Math.pow(x, 2));
}, 2000);
});
}
async function layer(x)
{
const value = await square(x);
console.log(value);
}
layer(10);nodejs promise async
// Normal Function
function add(a,b){
return a + b;
}
// Async Function
async function add(a,b){
return a + b;
}"when.promise" async await
/* Promise */somePromiseFunction() .catch(error => handlerErrorFunction(error)) .then(() => doSomethingFunction());/* async/await */try { await somePromiseFunction();} catch (error) { handleErrorFunction(error);} finally { doSomethingFunction();}"when.promise" async await
/* Promise */const promiseFunction = () => { ... return somePromiseFunction();}/* async/await */const asyncFunction = async () => { ... return await somePromiseFunction();}Copyright © 2021 Codeinu
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