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