Test whether the browser supports JavaScript scripts

If the user is unsure whether the browser supports JavaScript scripting, then the HTML-provided comment symbol can be applied for validation. The HTML comment symbol ends with <-- . If you write a javascrip T script within this comment symbol, the JavaScript script will be processed as a comment for browsers that do not support JavaScript.

Use JavaScript script to output a string in the page, write JavaScript script in HTML comments, if the browser supports JavaScript will output this string, if not support will not output this string, the code is as follows:

<script><!--document.write ("Your browser supports JavaScript scripts!"); /--></script>

Test whether the browser supports JavaScript scripts