WHATEVER HAPPENED TO GOOD OLD HTML?
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WebDevs, install the NoScript addon to your browser and check your pages before deploying them. You might be surprised.
NoScript is available for Firefox (https://addons.mozilla.org/en-US/firefox/addon/noscript/) and Chromium-based browsers like Chrome, Edge, Brave, Vivaldi (https://chrome.google.com/webstore/detail/noscript/doojmbjmlfjjnbmnoijecmcbfeoakpjm)
Using NoScript can make your browsing safer, too: “Because many web browser attacks require active content that the browser normally runs without question, disabling such content by default and using it only to the degree that it is necessary reduces the chances of vulnerability exploitation.” (https://en.wikipedia.org/wiki/NoScript)
If you use JavaScript to impress and wow visitors, dig a little deeper into CSS3. You can do a lot, and I mean *a lot* of exciting things with just HTML5 and CSS3, as you can see (and learn) here: https://css-tricks.com Or here: https://www.w3schools.com/css