CSS Stats Report
Facebook.com
Facebook leans heavily on atomic CSS produced by their internal build, resulting in tens of thousands of single-property classes and very low cohesion per selector.
Published
May 12, 2025, 1:20 PM
Paths
Style Sheets
12
Style Elements
0
Total Unique Font Sizes
19
Total Unique Colors
156
ID Selectors
4
Universal Selectors
2
Unqualified Attribute Selectors
14
JavaScript Specific Selectors
92
Important Keywords
412
Float Properties
1
Average of Cohesion
1.218
Lowest Cohesion
81
Lowest Cohesion Selector
.x1n2onr6
Reading the numbers
- Atomic CSS pushes cohesion down close to 1.0 — every selector touches one property.
- The trade-off is huge stylesheet size offset by extreme dead-code elimination at build.