.every()

Tests whether all elements in the array pass the test implemented by the provided function.

Examples:

let numbers = [1, 2, 3, 4, 5];
let allPositive = numbers.every(num => num > 0);
console.log(allPositive); // true

let grades = [82, 95, 99, 78, 85];
let allPassing = grades.every(grade => grade >= 70);
console.log(allPassing); // true