What is noscript tag?

As the name implies, we can use noscript to render alternate content. Anything within < noscript>< /noscript> tags will render only when JavaScript is disabled . Users might disable JavaScript for a number of reasons. A handful of people even install browser extensions like NoScript to prevent the browser from running JavaScript. It's better to have the default be non-javascript , and then let a javascript code overwrite with a javascript enabled page. example
<!DOCTYPE html> <html> <head> <title>noscript</title> </head> <body> <script type = "text/JavaScript"> document.write("Hello World!") </script> <noscript> Your browser does not support JavaScript! </noscript> </body> </html>