Backbone.JS IsNew()

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:

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<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:

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True
True
True

Explanation:
In the above example, the model is new.