Comment by yarlinghe
Yep — fully agree.
For modern HTML/CSS/JS, you should just write the character and serve UTF-8. The entities / codes are there purely as reference for legacy cases, debugging, or when you only have a code point and no rendered glyph — not as a recommendation for normal authoring.
Your site still says "HOW TO ADD ALMOST EQUAL TO IN HTML? Use an HTML entity, a decimal code, or a hex code."
That is incorrect. As you say, you should just write the character in your HTML and ensure it's served with the correct encoding. If it's just for legacy cases, debugging or such, say so on the site.