Cloning an Array in JavaScript

Clone JavaScript array using Object.assign() method

You can clone JavaScript arrays using the Object.assign() method. The method is used to copy properties from the source object to the target object by passing an array as a source value and an empty object as a destination value. Below is an example of cloning an array using the Object.assign() method:

let array = ['Pineapple', 'Strawberry', 'Peach'];
 
let clone = Object.assign(array);

console.log(clone);

// output: ['Pineapple', 'Strawberry', 'Peach']

Clone JavaScript array using array.reduce() method

You can clone JavaScript arrays using the array.reduce(callback, initialValue) method. The reduce() method executes a callback function for each array element. Below is an example of cloning an array using the array.reduce() method:

let array = ['Apple', 'Orange', 'Melon'];
 
const callback = (arr, value, index) => {
	arr[index] = value;
	return arr;
};
 
let clone = array.reduce(callback, []);

console.log(clone);

// output: ['Apple', 'Orange', 'Melon']

Clone JavaScript array using array.forEach() method

You can clone JavaScript arrays using the array.forEach(callback, thisValue) method. This method executes a function for each array element. Below is an example of cloning an array using the array.forEach() method:

let array = ['Grape', 'Pear', 'Cherry'];
 
let clone = [];

array.forEach((value, index) => clone[index] = value);

console.log(clone);

// output: ['Grape', 'Pear', 'Cherry']

Clone JavaScript array using Spread Operator

You can clone JavaScript arrays using the spread ("...") operator. The spread operator ("...") was added to JavaScript in the ES6 standard. JavaScript arrays can be cloned using the following syntax: [...array]. Below is an example of cloning an array using the spread operator:

let array = ['a', 'b', 'c'];
 
let clone = [...array];

console.log(clone);

// output: ['a', 'b', 'c']

Clone JavaScript array using for loop

You can also clone JavaScript arrays by using a for loop. Here is an example of cloning an array with the use of a for loop:

let array = ['Raspberry', 'Apple', 'Mango'];
 
let clone = [];

for (let i = 0 ; i < array.length; i++) {
    clone[i] = array[i];
}
 
console.log(clone);

// output: ['Raspberry', 'Apple', 'Mango']

See also

• How do I check if an array contains a value in JavaScript?
• How do I slice an array in JavaScript?
• How do I reverse an array in JavaScript?
• How to get the sum of an array in JavaScript?
• How do I concatenate an array into a string in JavaScript?