Use the concat() method to concat (joins) two or more arrays in JavaScript. This method returns a new array, containing the joined arrays. It does not change the original arrays.
array1.concat(array2)Example concat two Arrays in JavaScript
Simple example code.
<!DOCTYPE html>
<html>
<head>
<script>
const arr1 = ["Apple", "Orange"];
const arr2 = ["Cherry", "Kiwi"];
const res = arr1.concat(arr2);
console.log(res)
</script>
</head>
</html>
Output:
More example
var a = ['a','b','c'];
var b = ['d','e','f'];
var c = a.concat(b); //c is now an an array with: ['a','b','c','d','e','f']
console.log( c[3] ); //c[3] will be 'd'Using modern JavaScript syntax – spread operator:
const a = ['a', 'b', 'c'];
const b = ['d', 'e', 'f'];
const c = [...a, ...b]; // c = ['a', 'b', 'c', 'd', 'e', 'f']
It is also the fastest way to concatenate arrays in JavaScript today.
Do comment if you have any doubts or suggestions on this JS Concat Arrays.
Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version