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BackboneJS-Model changedAttributes
Description
It returns a hash of only the model's attributes that have changed since the last set or else becomes false, if there are no attributes.
Syntax
model.changedAttributes(attributes) |
Parameters:
- attributes: Attributes define property of a model.
Example
<!DOCTYPE html> <head> <title>Model 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"> var values = new Backbone.Model({ name1: 'sachin', name2: 'dhoni', name3: 'sehwag' }); values.on('change', function() { document.write("The changed attributes are: "); document.write(JSON.stringify(values.changedAttributes())); }); values.set({ name1: 'yuvraj', name2: 'raina' }); </script> </body> </html>
Output
Let's carry out the following steps to see how above code works:
Save above code in changedAttributes.htm file
Open this HTML file in a browser.
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