Are HTML Comments in Script Tags Still a Necessary Practice?

HTML Comments in Script Tags: A Legacy Practice

In the early days of JavaScript, inline scripts were often placed within HTML comments to prevent incompatible browsers from displaying them. However, with advancements in web technology, this practice has become obsolete.

Irrelevance of JavaScript Compatibility

Modern browsers, including those on mobile devices, universally support JavaScript. Therefore, the goal of hiding JavaScript from unsupported browsers is moot.

Drawbacks of HTML Comments in Scripts

Matt Kruse from JavaScript Toolbox outlines the specific reasons why HTML comments should not be used in script blocks:

• Breaks XHTML Compatibility: HTML comments hide JavaScript source in XHTML documents, making the script useless.
• Invalid Syntax: The "--" syntax used for HTML comments is not allowed within HTML comments, causing potential issues with decrement operations.

Best Practice Today

For optimal performance and reliability, it is best to avoid HTML comments within script blocks. Instead, use the proper