Example 1: concatenate javascript array
const fruits = ['apple', 'orange', 'banana'];
const joinedFruits = fruits.join();
console.log(joinedFruits); // apple,orange,banana
Example 2: combine two arrays javascript
let arr1 = [0, 1, 2];
let arr2 = [3, 5, 7];
let primes = arr1.concat(arr2);
// > [0, 1, 2, 3, 5, 7]
Example 3: merge array in js
//for ES5
var array1 = ["Rahul", "Sachin"];
var array2 = ["Sehwag", "Kohli"];
var output = array1.concat(array2);
console.log(output);
//for ES6, we use spread operators to concat arrays
var array1 = ["Dravid", "Tendulkar"];
var array2 = ["Virendra", "Virat"];
var output = [...array1, ...array2];
console.log(output);
Example 4: js merge 2 lists
var array1 = ["Vijendra", "Singh"];
var array2 = ["Singh", "Shakya"];
console.log(array1.concat(array2));
// output: ["Vijendra", "Singh", "Singh", "Shakya"]
Example 5: js combine arrays
const array1 = ["Vijendra","Singh"];
const array2 = ["Singh", "Shakya"];
const array3 = [...array1, ...array2];
Example 6: js join two arrays
[1,2,3].concat([4,5,6])
// [1,2,3,4,5,6]