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BackboneJS - Collection Reset
Description
It resets the collection and populates with the new array of models or will empty the entire collection.
Syntax
collection.reset(models,options)
Parameters
models − It contains the names of the collection instances, which need to be reset in the collection.
options − The options include null value to empty the collection.
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 'C_Name' is a model name and includes default value var C_Name = Backbone.Model.extend ({ defaults: { country: "sachin" } }); //'PlayersCollection' is an instance of collection and model 'C_Name' is specified by using //model property var PlayersCollection = Backbone.Collection.extend ({ model: C_Name }); //The 'country1' and 'country2' are the instances of the model 'C_name' var country1 = new C_Name({country: "australia"}); var country2 = new C_Name({country: "england"}); //Add the model instances to the collection using 'mycollection' collection instance var mycollection = new PlayersCollection(); mycollection.add([country1,country2]); //The 'length' property defines length of the collection document.write('Number of added countries: ' + mycollection.length); document.write("<br>"); //Here, the reset() method resets the collection otherwise empties the collection mycollection.reset(); document.write('Number of countries after reset: ' + mycollection.length); </script> </body> </html>
Output
Let us carry out the following steps to see how the above code works −
Save the above code in the reset.htm file.
Open this HTML file in a browser.
backbonejs_collection.htm
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