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alexilyaev/css-guidelines.md

Created December 10, 2020 10:11
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CSS Styling Guidelines
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css-guidelines.md

CSS Styling Guidelines

  • Use rem units for font-size and line-height.
    • The user preferences are respected.
    • We can change the apparent px value of rem to whatever we'd like.
  • Use px, % or vw for layout purposes.
    • For example, when using margin, padding, width, height, etc.
    • Easier to implement design requirements.
    • Why not rem here as well?
      • Layout can break when changing the base browser font-size.
      • If users go through the trouble of changing the browser Font Size (instead of the Zoom feature), they usually expect only the font size to change.
    • Rare cases:
      • If an element box directly depends on the text inside it (only when the font size is fluid based on screen size), use em for layout (not rem).
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