How to Check Every Value in Array Satisfy Condition Using JavaScript ?

To check every value in JavaScript array you can use Array.prototype.every() method. It returns true if each item in array satisfies the condition else false.

let data = [1,2,3,4,5];
let val = data.every(item => item < 6);
if(val){
  console.log('Numbers less than 6 ');
} else{
  console.log('Numbers greater than 6 ');
}
// "Numbers less than 6 "