PUBLIC MARKS with tags api & html5

Can I rely on the Web Platform features to build my app? An overview of the device integration HTML5 APIs

The Page Visibility API lets you know when a webpage is visible or in focus. With tabbed browsing, there is a reasonable chance that any given webpage is in the background and thus not visible to the user. When the user minimizes the webpage or moves to another tab, the API sends a visibilitychange event regarding the visibility of the page. You can detect the event and perform some actions or behave differently. For example, if your web app is playing a video, it would pause the moment the user looks at another browser, and plays again when the user returns to the tab. The user does not lose her place in the video and can continue watching.

Look up HTML5 features, know if they are ready for use, and if so find out how you should use them – with polyfills, fallbacks or as they are

IE doesn't support getters and setters, so Canto does not currently work in that browser

Browserscope is a community-driven project for profiling web browsers. The goals are to foster innovation by tracking browser functionality and to be a resource for web developers.

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