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Traducir: guide/set-document-title.md #215 (#259)

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Co-authored-by: Daniel Díaz <36966980+dalejodc@users.noreply.github.com>
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{@a top}
# Set the document title
Your app should be able to make the browser title bar say whatever you want it to say.
This cookbook explains how to do it.
See the <live-example name="set-document-title"></live-example>.
## The problem with *&lt;title&gt;*
The obvious approach is to bind a property of the component to the HTML `<title>` like this:
<code-example format=''>
&lt;title&gt;{{This_Does_Not_Work}}&lt;/title&gt;
</code-example>
Sorry but that won't work.
The root component of the application is an element contained within the `<body>` tag.
The HTML `<title>` is in the document `<head>`, outside the body, making it inaccessible to Angular data binding.
You could grab the browser `document` object and set the title manually.
That's dirty and undermines your chances of running the app outside of a browser someday.
<div class="alert is-helpful">
Running your app outside a browser means that you can take advantage of server-side
pre-rendering for near-instant first app render times and for SEO. It means you could run from
inside a Web Worker to improve your app's responsiveness by using multiple threads. And it
means that you could run your app inside Electron.js or Windows Universal to deliver it to the desktop.
</div>
## Use the `Title` service
Fortunately, Angular bridges the gap by providing a `Title` service as part of the *Browser platform*.
The [Title](api/platform-browser/Title) service is a simple class that provides an API
for getting and setting the current HTML document title:
* `getTitle() : string`&mdash;Gets the title of the current HTML document.
* `setTitle( newTitle : string )`&mdash;Sets the title of the current HTML document.
You can inject the `Title` service into the root `AppComponent` and expose a bindable `setTitle` method that calls it:
<code-example path="set-document-title/src/app/app.component.ts" region="class" header="src/app/app.component.ts (class)"></code-example>
Bind that method to three anchor tags and voilà!
<div class="lightbox">
<img src="generated/images/guide/set-document-title/set-title-anim.gif" alt="Set title">
</div>
Here's the complete solution:
<code-tabs>
<code-pane header="src/main.ts" path="set-document-title/src/main.ts"></code-pane>
<code-pane header="src/app/app.module.ts" path="set-document-title/src/app/app.module.ts"></code-pane>
<code-pane header="src/app/app.component.ts" path="set-document-title/src/app/app.component.ts"></code-pane>
</code-tabs>
## Why provide the `Title` service in `bootstrap`
Generally you want to provide application-wide services in the root application component, `AppComponent`.
This cookbook recommends registering the title service during bootstrapping,
a location you reserve for configuring the runtime Angular environment.
That's exactly what you're doing.
The `Title` service is part of the Angular *browser platform*.
If you bootstrap your application into a different platform,
you'll have to provide a different `Title` service that understands
the concept of a "document title" for that specific platform.
Ideally, the application itself neither knows nor cares about the runtime environment.

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aio/content/guide/set-document-title.md
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{@a top}
# Set the document title
# Establecer el título del documento
Your app should be able to make the browser title bar say whatever you want it to say.
This cookbook explains how to do it.
Tu aplicación debería poder hacer que el título de la barra del navegador diga lo que quieras que diga.
Esta guía explica cómo hacerlo.
See the <live-example name="set-document-title"></live-example>.
Ve el <live-example name="set-document-title"></live-example>.
## The problem with *&lt;title&gt;*
## El problema con el *&lt;título&gt;*
The obvious approach is to bind a property of the component to the HTML `<title>` like this:
La manera mas obvia es enlazar una propiedad del componente al HTML `<title>` como este:
<code-example format=''>
&lt;title&gt;{{This_Does_Not_Work}}&lt;/title&gt;
&lt;title&gt;{{Esto_No_Funciona}}&lt;/title&gt;
</code-example>
Sorry but that won't work.
The root component of the application is an element contained within the `<body>` tag.
The HTML `<title>` is in the document `<head>`, outside the body, making it inaccessible to Angular data binding.
Lamentablemente eso no funcionará. El componente raíz de la aplicación es un elemento contenido en la etiqueta `<body>`. El `<title>` HTML está en el `<head>` del documento, fuera del `<body>`, lo que lo hace inaccesible para el enlace de datos de Angular.
You could grab the browser `document` object and set the title manually.
That's dirty and undermines your chances of running the app outside of a browser someday.
Tu podrías tomar el objeto `document` del navegador y establecer el título manualmente.
Eso no es ideal y socava tus posibilidades de ejecutar la aplicación fuera de un navegador algún día.
<div class="alert is-helpful">
Running your app outside a browser means that you can take advantage of server-side
pre-rendering for near-instant first app render times and for SEO. It means you could run from
inside a Web Worker to improve your app's responsiveness by using multiple threads. And it
means that you could run your app inside Electron.js or Windows Universal to deliver it to the desktop.
Ejecutar tu aplicación fuera de un navegador significa que puedes aprovechar las ventajas del renderizado del lado del servidor
para tiempos del primer renderizado de la primera aplicación casi instantáneos y para SEO. Significa que puedes correr la aplicación
dentro de un Web Worker para mejorar la capacidad de respuesta de tu aplicación mediante el uso de varios subprocesos. Y también
significa que puedes ejecutar tu aplicación dentro de Electron.js o Windows Universal para enviarla al escritorio.
</div>
## Use the `Title` service
## Utiliza el servicio `Title`
Fortunately, Angular bridges the gap by providing a `Title` service as part of the *Browser platform*.
The [Title](api/platform-browser/Title) service is a simple class that provides an API
for getting and setting the current HTML document title:
Afortunadamente, Angular reduce las diferencias al proporcionar un servicio `Title` como parte de la *plataforma del navegador*.
El servicio [Title](api/platform-browser/Title) es una clase simple que proporciona un API
para obtener y configurar el título del documento HTML actual:
* `getTitle() : string`&mdash;Gets the title of the current HTML document.
* `setTitle( newTitle : string )`&mdash;Sets the title of the current HTML document.
You can inject the `Title` service into the root `AppComponent` and expose a bindable `setTitle` method that calls it:
* `getTitle() : string`&mdash;Obtiene el título del documento HTML actual.
* `setTitle( newTitle : string )`&mdash;Establece el título del documento HTML actual.
Puedes inyectar el servicio `Title` en la raíz de `AppComponent` y exponer un método `setTitle` enlazable que lo llame:
<code-example path="set-document-title/src/app/app.component.ts" region="class" header="src/app/app.component.ts (class)"></code-example>
Bind that method to three anchor tags and voilà!
¡Enlaza ese método a tres etiquetas de anclaje y listo!
<div class="lightbox">
<img src="generated/images/guide/set-document-title/set-title-anim.gif" alt="Set title">
</div>
Here's the complete solution:
Aquí está la solución completa:
<code-tabs>
<code-pane header="src/main.ts" path="set-document-title/src/main.ts"></code-pane>
@ -59,16 +56,16 @@ Here's the complete solution:
<code-pane header="src/app/app.component.ts" path="set-document-title/src/app/app.component.ts"></code-pane>
</code-tabs>
## Why provide the `Title` service in `bootstrap`
## ¿Por qué proporcionar el servicio `Title` en el `arranque`?
Generally you want to provide application-wide services in the root application component, `AppComponent`.
Por lo general, deseas proporcionar servicios para toda la aplicación en el componente de la aplicación raíz, `AppComponent`.
This cookbook recommends registering the title service during bootstrapping,
a location you reserve for configuring the runtime Angular environment.
Esta guía recomienda registrar el servicio de títulos durante el arranque (boostrapping),
una ubicación que se reserva para configurar el ambiente de ejecución de Angular.
That's exactly what you're doing.
The `Title` service is part of the Angular *browser platform*.
If you bootstrap your application into a different platform,
you'll have to provide a different `Title` service that understands
the concept of a "document title" for that specific platform.
Ideally, the application itself neither knows nor cares about the runtime environment.
Eso es exactamente lo que está haciendo.
El servicio `Title` es parte de la *plataforma del navegador* de Angular.
Si inicias tu aplicación en una plataforma diferente,
tendrás que proporcionar un servicio de `Title` diferente que comprenda
el concepto de un "título de documento" para esa plataforma específica.
Idealmente, la aplicación en sí no conoce ni se preocupa por el ambiente de ejecución.