stop other JavaScript (as best as can be done) and show noscript elements
Read more about it in my blog post: All-Or-Nothing Enhancement
You can just grab the noscript.min.js file from this repository, or you can
use Bower:
bower install noscript
Include noscript.js on your web page. This installs a global noscript
object. You may want the poly-fills in the lib directory if you plan on using
this with older browsers.
This will find all noscript elements on the page, and make their contents
visible, just as though the browser had JavaScript disabled.
Caution: this will only work on elements that were on the page before
noscript.show() was called. That means that you'll likely want to do this
after all other HTML elements have been declared (e.g. at the bottom of the
body element.
There doesn't seem to be a way to disable JavaScript via JavaScript. So, this method hunts down various APIs that govern side-effects (e.g. HTML DOM, AJAX, etc) and tampers with them to the point where they hopefully become useless.
Caution: you need to call this after calling noscript.show(), because
that method will not work at all after .lockdown(). If you have no
noscript elements on the page, then feel free to call this as early as
possible. You'll want to call this before any JavaScript to be blocked.
<!DOCTYPE html>
<html>
<head>...</head>
<body>
<noscript>Error: bad device or web browser</noscript>
...
<script src="noscript.js"></script>
<script>
if (!window.JSON) {
noscript.show();
noscript.lockdown();
}
</script>
</body>
</html>