May 22, 2026 - The spread (...) syntax allows an iterable, such as an array or string, to be expanded in places where zero or more arguments (for function calls) or elements (for array literals) are expected. In an object literal, the spread syntax enumerates the properties of an object and adds the key-value ...

October 18, 2022 - When ... is at the end of function ... ... occurs in a function call or alike, it’s called a “spread syntax” and expands an array into a list....

February 8, 2024 - The spread operator simplifies the process of passing variable-length arguments to functions. Instead of specifying each argument individually, we can use the spread operator to unpack an array of values into function parameters.

Spread syntax can be used when calling constructors that accept multiple arguments: We can easily convert a Set or a NodeList to an array: By combining Set and spread syntax , we can remove duplicates from an array: Strings are iterable, so we can spread them into arrays of characters: Rest parameters allow us to represent an indefinite number of arguments as an array.

September 18, 2023 - The spread operator, denoted by ..., allows you to spread the elements of an iterable (e.g., an array or a string) into another iterable, function arguments, or object literals. It's a concise and elegant way to clone arrays, merge arrays, and ...

August 15, 2018 - As you can see, the spread operator takes the array of parameters and spreads them across the arguments in the function call. But what if we need our function to be able to work with an unknown number of parameters?

July 23, 2025 - JavaScript · <script> function add(a, b = 3) { return a + b } console.log(add(5, 2)) console.log(add(5)) </script> Output: 7 8 · Spread Operator: It is another operator provided through ES6 it generally spreads data of array/list.

A: The spread operator (...) is used to expand an array or object into its individual elements or properties. Q: What is the rest operator in JavaScript? A: The rest operator (...) is used to collect multiple elements or properties into an array ...

October 27, 2025 - The rest parameter collects multiple values into an array, while the spread operator spreads elements from an array or object.

November 10, 2022 - It is most commonly used in function calls to expand the iterable at the time of parameter initialization. Here we are going to show the use of the spread operator in the function call. We will create an array of strings and pass it as a function argument for printing.

In JavaScript, it's important to write code that is both simple and works well. Two tools that help do this are called Rest Parameters and Spread Syntax. These tools help programmers write better and simpler code.

The JavaScript spread operator (...) allows an iterable to be expanded in places where zero or more arguments or elements are expected. In this tutorial, you will learn about the JavaScript spread operator with the help of examples.

January 30, 2019 - Its usage is almost the opposite of rest parameters. Instead of collecting multiple values in one array, it lets you expand one existing array (or other iterable) into multiple values.

September 15, 2021 - In the snippet above, we used the spread syntax to spread the numbers array’s content across addNumbers()’s parameters.

January 8, 2019 - Just as the spread operator allows you to expand an array into its individual elements, the rest parameter lets you bundle elements back into an array.

May 8, 2024 - const odd = [1,3,5]; const combined = [2,4,6, ...odd]; console.log(combined);Code language: JavaScript (javascript) ... In this example, the three dots ( ...) located in front of the odd array is the spread operator. The spread operator (...) unpacks the elements of the odd array. Note that ES6 also has the three dots ( ...) which is a rest parameter that collects all remaining arguments of a function into an array.

November 19, 2020 - In JavaScript, spread syntax refers to the use of an ellipsis of three dots (…) to expand an iterable object into the list of arguments.

April 3, 2019 - A variadic function is a function which can have a variable number of parameters. Here when we return args, we see that we get back our array which we passed as separate values in the call. This shows that the rest operator actually works exactly opposite of the spread syntax.