The spread operator is a useful and quick syntax for adding items to arrays, combining arrays or objects, and spreading an array out into a function’s arguments.

Feb 2, 2024 · This guide focuses on the key ins and outs of JavaScript append to object and will equip you with the knowledge to confidently handle object manipulation in JavaScript.

Jul 10, 2025 · For copying property definitions (including their enumerability) into prototypes, use Object.getOwnPropertyDescriptor() and Object.defineProperty() instead. Both String and Symbol …

Jul 23, 2025 · In this approach, we use the Object.entries () method to get an array of key-value pairs from the new object. Then, we use the Array.prototype.forEach () method to iterate over these pairs …

Nov 14, 2025 · This guide will walk you through every method to add objects to another in JavaScript, from native solutions like Object.assign() and the spread operator to libraries like Lodash, and even …

Mar 14, 2023 · This succinct, straightforward article will walk you through 5 different ways to add new properties to an existing object in JavaScript. We’ll write code with the modern feature of the …

Jul 25, 2025 · Explore various methods for adding new properties to JavaScript objects, from basic dot and bracket notation to modern spread syntax and Object.assign ().

In JavaScript, using the dot (.) operator we can access a variable which is stored in an object. The dot (.) operator will act as a connector between the object and the variable to be added.

Dec 17, 2025 · In addition to objects that are predefined in the browser, you can define your own objects. This chapter describes how to use objects, properties, and methods, and how to create your …

Explore various methods for adding key-value pairs to JavaScript objects and choose the right approach for your tasks. Learn how to do it correctly.