‘property: 0’ or ‘property: 0px’ in CSS?

by

Unit identifiers are optional, but there is no noted performance increase (although you are saving two characters).

CSS2 – From W3C CSS 2.1 Specification for Syntax and basic data types:

The format of a length value (denoted by <length> in this specification) is a <number> (with or without a decimal point) immediately followed by a unit identifier (e.g., px, em, etc.). After a zero length, the unit identifier is optional.

(Emphasis mine)

CSS3 – From W3C CSS Values and Units Module Level 3 (Currently in Candidate Recommendation at the time of this writing)

For zero lengths the unit identifier is optional (i.e. can be syntactically represented as the 0).

More Related Contents:

  1. How to change the cursor into a hand when a user hovers over a list item?
  2. What does the CSS rule “clear: both” do?
  3. How to remove the border highlight on an input text element
  4. Why do browsers create vendor prefixes for CSS properties?
  5. Why do the :before and :after pseudo-elements require a ‘content’ property?
  6. CSS3’s attr() doesn’t work in major browsers
  7. How and where to use ::ng-deep?
  8. relative path to CSS file [closed]
  9. Combining :last-child with :not(.class) selector in CSS
  10. CSS text-transform capitalize on all caps
  11. Using HTML data-attribute to set CSS background-image url
  12. What are `scrolling boxes`?
  13. Spin or rotate an image on hover
  14. Deprecated SMIL SVG animation replaced with CSS or Web animations effects (hover, click)
  15. How can I apply multiple transform declarations to one element?
  16. Fonts looks different in Firefox and Chrome
  17. Make HTML5 video poster be same size as video itself
  18. Why does stacking order change on webkit filter hover?
  19. css text gradient
  20. Forcing anti-aliasing using css: Is this a myth?
  21. Make CSS3 triangle with linear gradient
  22. Can I have different colored left and top borders in CSS?
  23. object-fit, object-positioning and absolute positioning
  24. Safe width in pixels for printing web pages?
  25. What are the rules around whitespace in attribute selectors?
  26. CSS: equal height columns
  27. Purpose of *:before, *:after rule without content property
  28. @media query not working in mobile. Works fine in Chrome
  29. Why does enabling hardware-acceleration in CSS3 slow down performance?
  30. SASS CSS: Target Parent Class from Child

Leave a Comment