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BackboneJS-Model validationError
Description
It is the returned value by validate() method which displays validation error, if validation fails or after the invalid event is triggered.
Syntax
model.validationError |
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 Person = Backbone.Model.extend({ defaults: { name: 'john', age: 25, occupation: 'working' }, initialize : function(){ this.on("invalid",function(model,error){ document.write(error); }); }, validate: function(attributes) { if ( attributes.age < 25 ) { return 'please enter the correct age!!! '; } if ( ! attributes.name ) { return 'please enter the name!!!'; } }, }); var person = new Person(); person.on('invalid', function() { this.arguments; }); person.set({ age : '20' }, { validate : true }); </script> </body> </html>
Output
Let's carry out the following steps to see how above code works:
Save above code in validationError.htm file
Open this HTML file in a browser.
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