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Common mistakes and misconceptions in HTML structure
The infinite <div> soup (Divitis)
It is truly amazing how humanity spent decades developing semantic markup only to wrap every single word in a generic, identity-crisis-ridden <div>. We build web pages like modern architectural marvels made entirely of drywall and zero load-bearing pillars, wondering why screen readers and search engines eventually get lost. To be fair, browsers are merciful enough to render this structural chaos without instantly bursting into flames, but your DOM tree deserves better.
Skipping heading levels for styling convenience
Ah, the classic crime of using an <h3> or <h4> simply because you liked the smaller default font size, completely skipping the <h2>. Browsers won't call the semantic police on you for doing this, but assistive technologies and document outlines rely heavily on a logical hierarchy. Jumping from an <h1> straight to an <h4> is like writing a textbook where Chapter 1 is followed immediately by Section 1.1.1 on page two.
Treating semantic tags as mere CSS class hooks
Using <section>, <article>, and <aside> purely because they look trendier than <div>—while completely ignoring their actual semantic purpose—defeats the entire point of modern web standards. Semantics are for accessibility and machine readability, not just for making your code look like it was written by someone who reads architecture manifestos before breakfast.
Little-known aspect and expert advice
The hidden power of native semantics over ARIA
Here is an expert truth that might sting a bit: if you have to write a mountain of ARIA attributes just to make a custom <div> behave like a button, you are probably building the wrong element. The golden rule of web accessibility is that native HTML elements do the heavy lifting for you.
Native elements like <button>, <dialog>, and <select> come pre-packaged with keyboard navigation, focus management, and screen reader announcements built directly into the browser engine. To admit our own limits as developers: we often get seduced by flashy JavaScript component libraries that reinvent basic elements from scratch, adding kilobytes of overhead for zero functional gain. Leaning on clean, native HTML structure remains the most reliable optimization you can make.