HTML | <script> defer Attribute

The HTML defer attribute is a Boolean attribute which is used to specify that script is executed when the page has finished parsing. This attribute only works with external scripts.

Syntax:

<script defer>

Example:

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        HTML <script> defer Attribute 
    </title> 
</head> 
  
<body style="text-align:center;"> 
    <h1 style="color:green">  
        GeeksForGeeks  
    </h1> 
  
    <h2>  
        HTML <script> defer Attribute 
    </h2> 
  
    <script id="myGeeks"
            type="text/javascript"
            src="my_script.js"
            defer> 
    </script> 
    <br> 
    <button type="button"
            onclick="myFunction()"> 
      Submit 
  </button> 
  
</body> 
  
</html> 

External script: my_script.js

function myFunction() { 
    alert("Script works"); 
} 

Output:
Before Click:

After Click:

Supported Browsers: The browsers supported by <script> defer Attribute are listed below:

Google Chrome
Internet Explorer
Firefox
Apple Safari
Opera

My Personal Notes

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Vijay Sirra

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