JavaScript – Script Tag, Attributes, and Syntax

September 22, 2020

The <script> tag is used to define the JavaScript code. It identifies the block of the script on the page.

The <script> tag loads the script file which has extensions [eg. .js, script.js], or the script code written inside the <script> tag.

Attributes of <script> Tag

Attribute	Value	Description
type	media_type	It specifies the media type of the script
src	url	It specifies the URL of the external file of JavaScript in the form of .js extension.
defer	defer	Specifies that the script is executed when the page has finished parsing support external script files.
charset	charset	Character encoding used in an external file of JavaScript.
XML:space	preserve	White space in code should be preserved
asyn	async	Specifies the script is executed asynchronously supports for external files.

The External JavaScript

The external JavaScript file is embedded like as following in a web page.

<script src="script.js"></script>

HTML / JS Code

<html>
 <head>
  <script type="text/javascript">
   function display(){
   alert ("Hello!");
   }
  </script>
 </head>
 <body>
  <input type="button" onClick="display()" value="How is That?">
 </body> 
</html>

In

Programming

Javascript