JavaScript Array every Method (Live Playground)

The JavaScript array every method checks whether all elements in the array pass the test implemented by the provided function. It returns a Boolean value.

Here's an example:

let numbers = [10, 20, 30, 40, 50];

let check = numbers.every(function (number) {
  return number >= 10;
});

console.log(check);
// Expected output: true

In this example, numbers.every(function(number) { return number >= 10; }) checks whether every element in the numbers array is greater than or equal to 10. Since all elements meet this condition, the output is true.

Live Playground, Try it Yourself

Here's another example where not every element passes the test:

let numbers = [10, 20, 30, 2, 50];

let check = numbers.every(function (number) {
  return number >= 10;
});

console.log(check);
// Expected output: false

In this scenario, the number 2 does not meet the condition, so the every method returns false.

Live Playground, Try it Yourself

Remember, the every method does not change the original array.

Mastering the every method is important as it's commonly used to check if all elements in an array satisfy a specific condition.