Question

How to use the spread operator with arrays in JavaScript

Answer 1

const arr1 = [5, 6, 7, 8];
const arr2 = [9, 3, 1];
    
const arr3 = [...arr1, ...arr2]
console.log(arr3);

const arr4 = ['x', ...arr1, 'y', ...arr2, 'z']
console.log(arr4);

  


/*
run:
       
[
  5, 6, 7, 8,
  9, 3, 1
]
[
  'x', 5, 6, 7, 8,
  'y', 9, 3, 1, 'z'
]
  
*/

 

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