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The preventDefault() method prevents the browser from executing the default action.
You can use the method isDefaultPrevented to know whether this method was ever called (on that event object).
Here is the simple syntax to use this method:
Here is the description of all the parameters used by this method:
Following is a simple example a simple showing the usage of this method. This example demonstrate how you can stop the browser from changing the page to the href of any anchors.
alert( "Default behavior is disabled!" );
<span>Click the following link and it won't work:</span>
<a href="http://www.google.com">GOOGLE Inc.</a>
To understand it in better way you can Try it yourself.