In JavaScript,promise.resolveis a method that creates a newPromiseobject that is resolved with a given value. This method is often used when working with asynchronous code, as it allows you to create aPromisethat is already settled (i.e., it is either fulfilled or rejected) rather than hav...
How to use Promise and setTimeout to mock an API call in JavaScript All In One 如何使用 Promise 和 setTimeout 在 JavaScript 中模拟一个 API 调用 argslistversion constgetMockData=async(data ='', error ='unknown server error', delay) => {returnnewPromise((resolve, reject) =>{setTimeout...
You can do the same with a for..in loop to iterate on an object:const fun = (prop) => { return new Promise(resolve => { setTimeout(() => resolve(`done ${prop}`), 1000); }) } const go = async () => { const obj = { a: 1, b: 2, c: 3 }; for (const prop in...
To create a promise, we need to create a Promise object: new Promise((resolve, reject) => { // Your code here }); Promises accept two arguments: a function that handles the success of the promise and a function that handles a failed promise. This means that our promise will return ...
Therefore, you simply need to throw an error inside the async function to make it reject. For example: function wait(ms) { return new Promise((resolve) => setTimeout(resolve, ms)); } async function foo() { await wait(1000); throw new Error('Woops!'); } console.log(await foo()...
In the majority of cases, it is sufficient to always resolve a promise with a result. The value of the result can be overloaded for error or success. The promise then always resolves successfully and the error condition is indicated by the value of the result. Oftentimes this is much easier...
In the example above, we first declare a function that returns a new promise that resolves to a value after one second. We then create an async function and wait for the promise to resolve before logging the returned value to the console....
Creating a promise can be as easy as returning a newPromise(). ThePromise()constructor receives a function as an argument, which should have two parameters -resolveandreject. In case our event is fulfilled, and we need to return the result, we use theresolve()function when succeeding in wh...
Or even multiple ones, if you have a chain of promises:const thePromise = new Promise((resolve, reject) => { resolve({ doSomething: function() { return new Promise((resolve, reject) => { reject('error!') //you can pass any value }) } }) }) thePromise .then(response => { ...
JavaScript to configure your video player. Use the cld-fluid class for responsive player sizing. This should be used over any JS configuration method to prevent unwanted player resizing.Below is a very simple example demonstrating how you should organize your code for the video player using the ...