Source @ github

Array.every

every — Executes a provided function once per array element. If the function returns a false value, it will break the loop.

Description

Array.every(function callback, [object this])

Parameters

Name Description Type Default Optional
callback See callback below. function No
this object Yes
callback

The following parameters is passed to the callback.

value

The value of the current index.

index

The current index.

array

The array.

Return values

Returns true if all iterations passed, otherwise false.

Examples

Example #1 – every example
var array = [2, 4, 8];

var result = array.every(function () {
	console.log(this);
	return true;
});

console.log(result);  // true
var arr = [2, 4, 8];

var result = arr.every(function (value, index, array) {
	console.log(value, index, array);
	return true;
});

console.log(result);  // true

Passing in a custom object for this.

var array = [2, 4, 8];

var result = array.every(function () {
	console.log(this);
	return true;
}, document.location);

console.log(result);  // true

Emulates a failed test when the value 4 is discovered.

var array = [2, 4, 8];

var result = array.every(function (value) {
	console.log(this);
	if (value === 4) {
		return 0;
	}
	return true;
});

console.log(result);  // false

External references