I can mark a JavaScript function as “async” (i.e., returning a promise) with the async keyword. Like this: async function foo() { // Do something } What is the equivalent syntax for arrow functions? 8 s 8 Async arrow functions look like this: const foo = async () => { // do something } Async … Read more
I want to work with promises but I have a callback API in a format like: 1. DOM load or other one time event: window.onload; // set to callback … window.onload = function() { }; 2. Plain callback: function request(onChangeHandler) { … } request(function() { // change happened … }); 3. Node style callback (“nodeback”): … Read more
What is the difference between Promise and Observable in Angular? An example on each would be helpful in understanding both the cases. In what scenario can we use each case? 3 32
Are there any issues with using async/await in a forEach loop? I’m trying to loop through an array of files and await on the contents of each file. import fs from ‘fs-promise’ async function printFiles () { const files = await getFilePaths() // Assume this works fine files.forEach(async (file) => { const contents = await … Read more
