BackboneSample1/model.html at master · hubbins/BackboneSample1 · GitHub

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<html>
	<head>
		<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
		<script src="//cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>
		<script src="//cdnjs.cloudflare.com/ajax/libs/backbone.js/1.2.2/backbone-min.js"></script>
	</head>
	<body>
		<div>

		</div>
	</body>

	<script>
		var Model = Backbone.Model.extend({
			url: "/users",
			defaults: {
				first: "Bob",
				last: "Tonks",
				email: "bob@bob.com"
			},
			validate: function(atts, ops) {
				if (atts.first === "Steve") {
					return "No Steve's allowed!";
				}
			}
		});

		var m = new Model();
		// only on change first name
		m.on("change:first", function() {
			console.log(m.isValid());
			console.log(m.validationError);
		});
		console.log(m.isValid());
		console.log(m.validationError);
		m.set("first", "Steve");
	</script>
</html>