# every()

## `areUndefined().every()`

Checks whether every provided [`value`](https://docs.angular-package.dev/type/are/areundefined/..#...values-any) of [`areUndefined()`](https://docs.angular-package.dev/type/are/areundefined) is [`undefined`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/undefined).

{% hint style="info" %}
The method uses [`every()`](https://docs.angular-package.dev/type/are/aredeterminer/every) method of [`areDeterminer()`](https://docs.angular-package.dev/type/are/aredeterminer).
{% endhint %}

### Returns

The **return value** is a [`boolean`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean) indicating whether the provided [`values`](https://docs.angular-package.dev/type/are/areundefined/..#...values-any) of [`areUndefined()`](https://docs.angular-package.dev/type/are/areundefined) are [`undefined`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/undefined).

## Example usage

```typescript
// Example usage.
import { areUndefined } from '@angular-package/type';

areUndefined(undefined, 2, 3, new String('4')).every((result, value, payload) => {
  result // false
  value // [ undefined, 2, 3, String]
  payload // undefined
  return result;
}); // false, boolean
```