Copy. In this article, we'll talk about the spread operator… Spread operators. spread operators however, let us unpack elements in an array to single/individual arguments. The spread operator (…) spreads the elements of an iterable like array or string in Javascript. With rest parameters we were able to get a list of arguments into an array. The cloning is always shallow. The spread syntax allows us to spread an array or any iterable to be expanded across zero or more arguments in a function call. The operator’s shape … Code language: JavaScript (javascript) Summary. It makes it easy to copy iterable objects, add items to a new iterable, and pass arguments to a function. JavaScript ECMAScript 6 introduced the spread operator. Spread Operators for Arrays. Object spread operator (...) unpacks the own enumerable properties of an object. The core piece to know is the ... syntax. The spread operator allows us to expand elements. The spread operator is widely used throughout JavaScript. JavaScript & The spread operator. This tutorial will help you understand it. The spread operator came out in ES6 and has great functionality for arrays in JavaScript. There are two features in particular that I'll be covering in this post: spread operator; rest parameter; Spread Operator. The syntax for the spread operator is three dots, followed by the iterable object which you want to access. JavaScript Spread Operator. It is mostly used in the variable array where there is more than 1 value is expected. When merging objects, the spread operator defines new properties while the Object.assign() assigns them. JavaScript spread operator is one of the more popular features that were introduced in ES6. With the introduction of ES6, Javascript developers gained a handful of features. Object spread operator can be used to clone an object or merge objects into one. The spread operator is simply three dots and it is … Spread operator allows an inerrable to expand in places where 0+ arguments are expected. This is the most succinct and immutable way that I've found. Boring stuff out of the way, let’s look at a bunch of examples to better understand what in the heck the spread operator … Some scenarios where this capability is useful include: Adding array elements to an existing array The spread operator is a feature of JavaScript introduced with ES6 that gives you access to the insides of an iterable object. The term “iterable object” is really just a computer science-y term for a category of data types. The spread operator allows an expression to be expanded in places where multiple elements/variables/arguments are expected. You will also learn how to use it to copy and merge arrays and object literals, insert data and more. With a major update in ES9, the spread operator is now extended to objects in addition to arrays. Using Slice. 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