Question

How to check if array has all elements of another array in JavaScript

Answer 1

const arr1 = [22, 26, 1, 8, 18, 99, 81];
const arr2 = [22, 26, 1, 8, 18, 99, 81, 100, 120];

console.log(arr1.every(element => { return arr2.includes(element); }));
   
   
    
    
/*
run:
    
true
  
*/
 

 

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Answer 2

const arr1 = [22, 26, 1, 8, 18, 99, 81];
const arr2 = [22, 26, 1, 8, 18, 99, 81, 100, 120];

console.log(arr1.every(r=> arr2.indexOf(r) >= 0));
   
   
    
    
/*
run:
    
true
  
*/

 

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