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22 days agoA web page is a combination of a structured document and a separate stylesheet. The same structured document can be styled in radically different ways just by changing the stylesheet. This is how a website can offer different skins, light/dark mode, etc.
Consider this basic HTML document:
<html>
<head><title>Test Page</title></head>
<body>
<p>This is a paragraph.</p>
<ul>
<li>This is an unordered bullet-point list item</li>
<li>This is also a list item</li>
</ul>
</body>
</html>
And here’s a stylesheet to make the bullet points square:
ul {
list-style-type: square;
}
Change the stylesheet and you change how the document is rendered. “Reader mode” is just a minimalist stylesheet built into the browser.
No matter how well you understand the passage of time in the abstract it’s a shock the first time you meet a full grown adult, with their own keys and everything, but you can remember what you were doing in the year they were born.