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25.07.2015
In addition to providing several new elements, HTML5 also introduced a set of new APIs including one that we are going to discuss in this post, called Fullscreen API. Then, we place the image at the center of the window as well as add a few decorative styles to make it look nicer. Click on the fulllscreen icon, and our image will go fullscreen, as shown in the following screenshot. Webkit (as well as Firefox) also provides a set of new pseudo-classes that allow us to add style rules when the element is in fullscreen mode.
Los dias en que los programadores debian depender en gran medida de librerias y plugins disenados por terceros para poder implementar la funcionalidad “arrastrar y soltar” en los sitios web estan llegando a su fin con la API Drag and Drop de HTML5. Esta API, que todavia no es del todo compatible tiene un soporte mundial un poco superior al 60%.
La manera de utilizarla es muy sencilla y la ejemplificaremos creando una web sencilla de notas que se limita solo a mostrar la funcionalidad de arrastrar y soltar.
En los estilos definidos se puede ver que el estilo de las notas en cada seccion de tipo de notas tiene un color diferente, por lo que si arrastramos una nota de una seccion a otra cambiara automaticamente su color. Hacemos un bucle sobre las notas a fin de agregar un nombre de clase unico para cada una (puede hacerse tambien asignando un id en lugar de una clase).
Seguidamente, se anade un detector de eventos o “event listener” para capturar el inicio del “arrastre” y asi guardar el nombre de clase del elemento (o en su caso el id) como datos a transferir. Finalmente, hacemos una iteracion sobre los tipos de secciones definidas y colocamos para cada caso el detector del evento “soltar”.
Remember when Mark Zuckerberg blamed the problematic old Facebook mobile app--dubbed "freakishly slow" by some--on "betting too much on HTML 5?" So does backend-as-a-service (BAAS) provider Sencha, and to rebut Zuckerberg's assertion that using HTML5 was "one of [Facebook's] biggest mistakes," Sencha built its own mobile webapp, Fastbook, to demonstrate that HTML5 is ready for prime time.
To be fair, Zuckerberg didn't trash HTML5 outright; he explained that many Facebook users actually use the mobile web site through a smartphone browser, and it was the specific HTML5 implementation of the Facebook mobile app which failed to meet expectations and led the company to develop native iOS and Android apps. Further investigation revealed that "the API calls returns[sic] huge amounts of raw data to the client. Once a software engineer in Silicon Valley; now a science fiction writer and puzzle hunt maker near Portland, Oregon.


Sencha's main business is client-side HTML-5 JavaScript frameworks, not back-end services mentioned in the intro here.
Fullscreen API is perhaps known for its spoofing potential, leading to major browser vendors canvassing for the implementation of an overlay to notify users when full-screen is activated. Feross demonstrated how the Fullscreen API can aid phishing attack portals appear rather innocuous to the end users, by utilizing the API to hide the interface elements of the users' browser, thereby preventing the user from knowing the URL of the actual website visited.
Unfortunately, Apple's Safari browser, version 6.01 and later, provides little or no sign that full-screen mode has been activated.
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In the past, to retrieve user location, we might need to provide a list of locations for users to opt-in, or rely on the device IP address to make a rough estimation of their location.
For more implementation on the Google Maps API, you can head over to the Google Maps JavaScript API v3 documentation. In the above code, we will first run a test whether the user’s device has support for Geolocation API.
When the location coordinate has been retrieved, it will send the data to GoogleMap function, to show in the map. Since this is a matter of user privacy, users have to be aware that the device or the Web they are visiting will be tracking their location. User agents must not send location information to Web sites without the express permission of the user. For this reason, the browser will first prompt the users whether they Allow or Deny for the browser to track their location information.
As we mentioned, we just did a simple thing with Geolocation, but the actual potential is so much more than that.
This API allows us to put our website or just a particular element on the webpage in fullscreen (and vice versa) using the browser’s native functionality.


Tambien hemos colocado el simbolo del cursor correspondiente para que el usuario sepa que los elementos pueden moverse. Agregamos tambien el atributo “draggable” con el valor “true” (este atributo puede ser definido tambien directamente el codigo HTML a cada una de las notas).
Como el nombre de las clases que hemos definido para las notas es unico luego podremos anadir un detector para el evento “soltar” y anadir el elemento con ese nombre de clase en contenedor (seccion o tipo de notas) en el que se esta soltando.
The Sencha Touch client-side framework is what developers should use if they want to emulate the achievement of the fastBook mobile app. Google Chrome, version 22 and later, offers some notice, though as Aboukhadijeh observes, the notification is "pretty subtle and easily missed." Mozilla Firefox, version 10 and later, alerts the user with a conspicuous notification.
There are a variety of ways to deceive people online and the only way to mitigate that risk is constant vigilance. Probably for that reason, it is often correlated and grouped with HTML5 in many books and references, although it has actually nothing to do with HTML5 technically.
It specifies with the navigator.geolocation object, as you can see from the following code. It turns out that the iPhone shows a more accurate location than one at my MacBook, as it is equipped with GPS hardware. However, there are times when we, as a web developer, want to add a trigger on the webpage to perform the function rather than use those keys. The idea is we will have an image and a button that will put the image fullscreen or change it back to normal view with a click. In average, 15KB to 20KB of gzipped JSON data is transferred for every 10 items, much of that is not needed to render the actual views." To improve performance, Sencha built a custom proxy server to clean up the raw data from the Facebook FQL API, and was able to reduce the amount of data transferred by up to 90%. Chad Hurley, CEO and co-founder of YouTube, was so impressed that he immediately offered him a job at YouTube.




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Comments to “Html5 video api tutorial”

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