One interesting feature is the ability to set a different "href" attribute for an anchor tag when JavaScript is disabled.
For instance:
When JavaScript is enabled:
<a href="#news">News</a>
If JavaScript is not enabled:
<a href="news.html">News</a>
To make a website interactive with JavaScript, you can assign the attribute in a data-xxxx and then use JavaScript to update the href with the value from data-xxxx.
For instance, in your HTML code, you may have:
<a href="news.html" data-js-href="#news">News</a>
Then, in your JavaScript code, you can implement:
var links = document.querySelectorAll('a[data-js-href]');
for (var i=0; i<links.length; ++i) {
links[i].setAttribute('href', links[i].getAttribute('data-js-href'));
}
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