BACKBONE.JS how check if is set attribute on model backbone - Net-Raft.com

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How check if is set attribute on the model using backbone ?


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<!DOCTYPE html>
<head>
<title> Model Example</title>
<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>

<script type="text/javascript">


var Lang = Backbone.Model.extend();
var lang = new Lang();

lang.set({ lang1: "Backbone.js", lang2:"Angular.js"});

if(lang.has('lang2'))
{
document.write("Lang2 is set");
}
else
{
document.write("Lang2 is not set");
}

</script>

</head>

<body>
</body>
</html>


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