With rest parameters we were able to get a list of arguments into an array. In this article, we'll talk about the spread operator… You will learn what spread operator is and how it works. 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 … The cloning is always shallow. The spread operator (…) spreads the elements of an iterable like array or string in Javascript. Following is the code for spread operator in function calls in JavaScript − The term “iterable object” is really just a computer science-y term for a category of data types. With a major update in ES9, the spread operator is now extended to objects in addition to arrays. The core piece to know is the ... syntax. 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 spread operator is widely used throughout JavaScript. JavaScript Spread Operator. Using Slice. This is yet another popular way to copy an array in Javascript. Object spread operator can be used to clone an object or merge objects into one. It is mostly used in the variable array where there is more than 1 value is expected. This is the spread operator, and it essentially takes either an array or an object and expands it into its set of items. Spread Operators for Arrays. spread operators however, let us unpack elements in an array to single/individual arguments. The spread operator allows an expression to be expanded in places where multiple elements/variables/arguments are expected. Code language: JavaScript (javascript) Summary. Object spread operator (...) unpacks the own enumerable properties of an object. You will also learn how to use it to copy and merge arrays and object literals, insert data and more. The spread operator came out in ES6 and has great functionality for arrays in JavaScript. JavaScript ECMAScript 6 introduced the spread operator. JavaScript & The spread operator. The operator’s shape … It makes it easy to copy iterable objects, add items to a new iterable, and pass arguments to a function. The syntax for the spread operator is three dots, followed by the iterable object which you want to access. The spread operator is much more powerful then it seems in this situation. Specifically: arrays, objects literals, and strings. Spread operators. There are two features in particular that I'll be covering in this post: spread operator; rest parameter; Spread Operator. With the introduction of ES6, Javascript developers gained a handful of features. The spread operator allows us to expand elements. Some scenarios where this capability is useful include: Adding array elements to an existing array JavaScript spread operator is one of the more popular features that were introduced in ES6. Copy. This tutorial will help you understand it. 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