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 ...

The JavaScript spread operator (...) expands an iterable (like an array) into more elements.

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.

February 8, 2024 - The spread operator, denoted by three consecutive dots (...), is primarily used for expanding iterables like arrays into individual elements. This operator allows us to efficiently merge, copy, or pass array elements to functions without explicitly iterating through them.

September 30, 2024 - // Spread in function call const numbers = [1, 2, 3]; console.log(Math.max(...numbers)); // Output: 3 // Rest in function definition function multiply(multiplier, ...numbers) { return numbers.map(num => num * multiplier); } console.log(multiply(2, ...

May 8, 2024 - 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. function f(a, b, ...args) { console.log(args); ...

October 1, 2025 - The spread operator in JavaScript is a syntax introduced in ECMAScript 6 (ES6) that allows you to spread the elements of an iterable (such as arrays, strings, or objects), into another iterable or function call.

The JavaScript spread operator (...) copies all or part of an existing array or object into another array or object.

September 23, 2019 - Another great way to use the spread operator is to make a copy of an array or an object. In JavaScript when you assign an object or array to a variable you're actually storing something called the "pointer", which sort of works like the address of where that object is being stored.

The spread operator (...) expands arrays, objects, and strings into individual values. Use it to copy data, merge arrays and objects, update state cleanly, and pass array values into functions without extra steps. ... Become a full-stack developer. Learn HTML, CSS, JavaScript, and React as well as NodeJS, Express, and SQL

July 11, 2022 - The spread operator essentially ‘scooped’ out the insides of the foo array and spread the values across the new array in bar. It’s important to note the brackets around the spread operator, [...foo]. The spread operator spreads these values within a new object of the same type; in this case, an array literal.

August 24, 2023 - Both the Spread Operator and Rest Parameter share the same syntax i.e. the three magical dots .... But they behave exactly opposite to each other. As a beginner, sometimes this may be confusing. The bottom-line to understand the behavior is to understand the context in which it is being used. As we learned, the spread operator expands the contents of an iterable.

June 23, 2026 - JavaScript spread (...) expands arrays and objects into individual elements — for copying, merging and passing arguments. Learn spread vs rest, with live examples.

June 5, 2024 - // Example with arrays const numbers = [1, 2, 3]; const moreNumbers = [...numbers, 4, 5, 6]; console.log(moreNumbers); // Output: [1, 2, 3, 4, 5, 6] // Example with objects const person = { name: 'Alice', age: 25 }; const updatedPerson = { ...person, age: 26, city: 'New York' }; ...

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.

The ... operator can pass arguments to functions: const numbers = [23,55,21,87,56]; let minValue = Math.min(...numbers); let maxValue = Math.max(...numbers); Try it Yourself » · The ... operator can copy arrays: const arr1 = [1, 2, 3]; const ...

February 23, 2024 - In the above example of the spread operator in JavaScript, we create a function that takes three arguments and performs an addition operation, and prints the answer to the console. Also, there is an array that contains three elements.

January 8, 2025 - The Spread Operator in JavaScript, represented by three dots (...), is used to expand or unpack elements of arrays, objects, or other iterables into individual elements.

September 27, 2019 - To put it simply, the spread operator '…' spreads the items that are contained in an iterable (an iterable is anything that can be looped over, like Strings, Arrays, Sets…) inside a receiver (A receiver is something that receives the spread values). Here are several simple examples with Arrays that will allow you to understand it better: