Validating during keypress
Events do not have to be declared before they are bound, and may take passed arguments.For example: Bind a callback function to an object.For rich client-side applications, a more structured approach is often helpful.With Backbone, you represent your data as Models, which can be created, validated, destroyed, and saved to the server.Whenever a UI action causes an attribute of a model to change, the model triggers a "change" event; all the Views that display the model's state can be notified of the change, so that they are able to respond accordingly, re-rendering themselves with the new information.In a finished Backbone app, you don't have to write the glue code that looks into the DOM to find an element with a specific id, and update the HTML manually — when the model changes, the views simply update themselves.
For example, consider fetching a Collection from an API that returns the real data array wrapped in metadata: Each View manages the rendering and user interaction within its own DOM element.Backbone is available for use under the MIT software license.You can report bugs and discuss features on the Git Hub issues page, on Freenode IRC in the = 1.11.0), and json2for older Internet Explorer support.object.off(null, on Change); // Removes all callbacks for `context` for all events.object.off(null, null, context); // Removes all callbacks on `object`.
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In rich web applications, we still want to provide linkable, bookmarkable, and shareable URLs to meaningful locations within an app.