Month: July 2025

What are the Timing Events? JavaScript timing events are used to execute the code after a specified time only once or multiple times. In JavaScript, you can use the timing events to control when a particular task should be executed. The ‘window’ object contains the various methods for timing events, which you can use to […]

The promise chaining in JavaScript can handle multiple related asynchronous operations even with a single promise. While a single promise handles a single asynchronous operation, the promise chaining allows you to create a sequence of promises. Here success or rejection of one promise triggers the execution of the next promise. This enables you to handle multiple asynchronous operations. In […]

Promisification in JavaScript Promisification in JavaScript is a concept to convert the callback functions into a regular function, returning the promise. The reason to convert the callback functions into promises is that when you need to write the nested callback functions, it increases the complexity of the code. So, you can write a function returning […]

Microtasks in JavaScript are small functions that are executed after the completion of the function or program code that creates them and if the JavaScript execution stack is empty. Microtasks are executed before any macrotasks, such as setImmediate() and setTimeout(). Microtasks are used to implement features such as promises. JavaScript is a single-threaded programming language. […]

The JavaScript functions defined with the async/await keyword can perform the same task as promises with fewer lines of code, and it makes the code readable. The promise’s syntax is a bit complex, so the async/await syntax is introduced. To use async/await, we need to define an aync function first. For this we write async before function […]

What is Promise in JavaScript? A JavaScript promise is an object that represents the completion or failure of an asynchronous operation. It employs callback functions to manage asynchronous operations, offering a easier syntax for handling such operations more easily. A promise object can created using the Promise() constructor. The promise constructor takes a callback function […]

What is the Callback Function? The callback function in JavaScript is regularly passed as an argument of another function. Dont consider the callback as a name or keyword here. The callback function name can be any valid identifier. The callback function can be called inside the parent function after completing the particular task in the […]

Asynchronous JavaScript is a programming technique that enables your program to start a potentially long-running task and continue to executing other tasks parallelly. JavaScript is a single-threaded programming language. It means you can execute a single script or particular code at a time. JavaScript control flow moves the line by line and executes each line […]