Spread & Rest Operators — Free JavaScript Tutorial

Learn Spread & Rest Operators in JavaScript with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.

Spread & Rest Operators — Free JavaScript Tutorial

Learn Spread & Rest Operators in JavaScript with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.

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TL;DR: Learn Spread & Rest Operators in JavaScript with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.

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Spread & Rest Operators in JavaScript

Spread `...` expands an iterable (array/string) into individual elements. Used in: function calls, array literals, object literals.

Rest `...` collects remaining elements into an array. Used in: function parameters, destructuring.

Copy array: `const copy = [...original]`. Merge arrays: `const merged = [...arr1, ...arr2]`.

Copy object: `const copy = {...original}`. Override: `const updated = {...user, age: 20}`.

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