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Editorial Team
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Asked: 2026-05-22T21:30:12+00:00

I often see articles, posts and comments something like: globals are bad in javascript

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I often see articles, posts and comments something like:

  • globals are bad in javascript
  • script tags should be at bottom of page
  • CSS should be in external files and at the top of page
  • scripts should be in external files, not plain script-tags.
  • etc.

I’ve looked up the HTML source of some big sites and have noticed that they have a lot of plain javascript and CSS inside HTML markup. JavaScript and HTML are note always obfuscated, and so on.

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1 Answer

  1. Editorial Team

    There are quite a few separate issues here.

    1. What you see when you “view source” is not usually what they develop with. It’s usually a compressed / optimised form generated from “source” code.
    2. Claims about what is “best practice” are necessarily generic, and don’t apply to all scenarios (especially if you’re a big site and need specialised optimisation). These guidelines should be considered individually for each project.
    3. Best practice, or even clean code, doesn’t directly translate to return on investment. It may be nice to have consistent naming schemes, but is it worth the time developing and enforcing the scheme across 100s of developers?
    4. Laziness, incompetence, or Friday nights.
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