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- BackboneJS - Sync
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BackboneJS - Collection Sync
Description
It uses Backbone.sync to persist the state of a collection to the server.
Syntax
collection.sync(method, collection, options)
Parameters
method − It represents the CRUD operations such as create, read, update and delete.
collection − It contains a set of models to save the data in the collection.
options − It fires success or error message depending on the method succeeded.
Example
<!DOCTYPE html> <html> <head> <title>Collection Example</title> <script src = "https://code.jquery.com/jquery-2.1.3.min.js" type = "text/javascript"></script> <script src = "https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.2/underscore-min.js" type = "text/javascript"></script> <script src = "https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js" type = "text/javascript"></script> </head> <body> <script type = "text/javascript"> //The sync() method reads and fetches the model data Backbone.sync = function(method, model) { document.write("The state of the model is:"); document.write("<br>"); //The 'method' specifies state of the model document.write(method + ": " + JSON.stringify(model)); }; //The 'myval' is collection instance and contains the values which are to be fetched //in the collection var myval = new Backbone.Collection ({ site:"TutorialsPoint", title:"Simply Easy Learning..." }); //The myval.fetch() method display the model's state by delegating the sync() method myval.fetch(); </script> </body> </html>
Output
Let us carry out the following steps to see how the above code works −
Save the above code in the sync.htm file.
Open this HTML file in a browser.
backbonejs_collection.htm
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