[@rxap/window-system](../wiki/globals) / WindowTitleDirective

# Class: WindowTitleDirective

Defined in: [packages/angular/window-system/src/lib/window-title.directive.ts:20](https://gitlab.com/rxap/packages/-/blob/3eebed1be2bbb37bc0d65959f8fecbb850c0b8aa/packages/angular/window-system/src/lib/window-title.directive.ts#L20)

## Implements

- `OnInit`

## Constructors

### new WindowTitleDirective()

> **new WindowTitleDirective**(): [`WindowTitleDirective`](../wiki/Class.WindowTitleDirective)

#### Returns

[`WindowTitleDirective`](../wiki/Class.WindowTitleDirective)

## Methods

### ngOnInit()

> **ngOnInit**(): `void`

Defined in: [packages/angular/window-system/src/lib/window-title.directive.ts:37](https://gitlab.com/rxap/packages/-/blob/3eebed1be2bbb37bc0d65959f8fecbb850c0b8aa/packages/angular/window-system/src/lib/window-title.directive.ts#L37)

A callback method that is invoked immediately after the
default change detector has checked the directive's
data-bound properties for the first time,
and before any of the view or content children have been checked.
It is invoked only once when the directive is instantiated.

#### Returns

`void`

#### Implementation of

`OnInit.ngOnInit`

***

### ngTemplateContextGuard()

> `static` **ngTemplateContextGuard**(`dir`, `ctx`): `ctx is WindowTitleTemplateContext`

Defined in: [packages/angular/window-system/src/lib/window-title.directive.ts:32](https://gitlab.com/rxap/packages/-/blob/3eebed1be2bbb37bc0d65959f8fecbb850c0b8aa/packages/angular/window-system/src/lib/window-title.directive.ts#L32)

Asserts the correct type of the context for the template that `NgForOf` will render.

The presence of this method is a signal to the Ivy template type-check compiler that the
`NgForOf` structural directive renders its template with a specific context type.

#### Parameters

##### dir

[`WindowTitleDirective`](../wiki/Class.WindowTitleDirective)

##### ctx

`any`

#### Returns

`ctx is WindowTitleTemplateContext`