The Backbone.JS IdAttribute() model is used to specify the model’s unique identifier.
Syntax:
Model.IdAttribute
Example:
<title>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>
<script type="text/javascript">
var X = Backbone.Model.extend({
defaults: {
idAttribute: 'id'
}
});
var Y = new X({id:5});
document.write("<b>Unique identifier:</b> ", Y.idAttribute);
</script><b>Unique identifier:</b> id
<title>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>
<script type="text/javascript">
var X = Backbone.Model.extend({
defaults: {
idAttribute: 'id'
}
});
var Y = new X({id:5});
document.write("<b>Unique identifier:</b> ", Y.idAttribute);
</script><b>Unique identifier:</b> id
Example Unique identifier: id
Output:
Unique identifier: id
Unique identifier: id
Unique identifier: id
Explanation:
The unique identifier is set as id.