The Backbone.JS IsNew() model is used to check if a model doesn’t have an id and is not saved to the server, to determine it as a new.
Syntax:
Model.IsNew ()
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: {
msg: "Welcome."
}
});
var Y = new X();
document.write(Y.isNew());
</script>true
<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: {
msg: "Welcome."
}
});
var Y = new X();
document.write(Y.isNew());
</script>true
Example true
Output:
True
True
True
Explanation:
In the above example, the model is new.