HTML | DOM Track default property

The DOM track default property is used to set or return the default state of the track. It reflects thedefault attribute.

Note: With a default attribute, there must not be more than one track element per media element.

Syntax:

It is used to return the default property.
```
trackObject.default
```
It is also used to set the default property.
```
trackObject.default = true|false
```

Value: It is either true or false which shows the default state of the track. By default, it is false.

true: If the preferences of user do not indicate that another track would be more appropriate then track is to be enabled.
false: If the preferences of user do not indicate that another track would be more appropriate then track is not to be enabled.

Return Value: It returns the default state of the track in the form of boolean value.

<html> 
  
<head> 
    <style> 
        body { 
            text-align: center; 
        } 
          
        h1 { 
            color: green; 
        } 
    </style> 
</head> 
  
<body> 
    <h1>GeeksforGeeks</h1> 
    <h2> 
      Track default Property 
  </h2> 
  
    <video width="100" 
           height="100"
           controls> 
  
        <track src= 
"https://contribute.geeksforgeeks.org/wp-content/uploads/11.mp4" 
               kind="subtitles"
               srclang="en" 
               label="English" 
               default> 
  
            <source id="myTrack" 
                    src= 
"https://contribute.geeksforgeeks.org/wp-content/uploads/11.mp4" 
                    type="video/mp4"> 
  
    </video> 
  
    <p> 
      Click the button to get the  
      default property of the track. 
  </p> 
  
    <button onclick="myFunction()"> 
        Get Default property 
    </button> 
  
    <p id="gfg"></p> 
    <!-- Script to set the default property -->
    <script> 
        function myFunction() { 
            var x = 
                document.getElementById("myTrack"); 
            x.default = true; 
            document.getElementById("gfg").innerHTML =  
              myTrack.default; 
        } 
    </script> 
</body> 
  
</html> 

Output:
Before clicking on the button:

After clicking on the button:

Supported Browsers:

Google Chrome
Internet Explorer 10.0+
Opera

My Personal Notes

Recommended Posts: