HTML Script Tag

HTML script tag is used to specify client-side script such as JavaScript. It facilitate you to place a script within your HTML document.

JavaScript is used for image manipulation, form validation, and dynamic content.

The syntax of script tag is given below:

<script>
  //code to be executed
</script>

Attributes of HTML script tag

Attribute	Description	Compatibility
src	It specifies the URL of an external script file.	HTML 4.01, HTML5
type	It specifies the media type of the script.	HTML 4.01
async	It is a boolean value which specifies that the script is executed asynchronously.	HTML5
defer	It is a boolean value which is used to indicate that script is executed after document has been parsed.	HTML 4.01, HTML5

There can be two usage of HTML script tag:

The script tag can be used within <body> or <head> tag to embed the scripting code. Let's see the example to have script tag within HTML body.

<script type="text/javascript">
document.write("JavaScript is a simple language for trainingtrains learners")
</script>

Output:

JavaScript is a simple language for trainingtrains learners

Let's see the example to have script tag within HTML head tag.

<script type="text/javascript">  
function msg(){  
 alert("Hello trainingtrains");  
}  
</script> 

The script tag can be used to link external script file by src attribute. It must be used within the <head> tag only.

Element	Chrome	IE	Firefox	Opera	Safari
<script>	Yes	Yes	Yes	Yes	Yes