Stage 05 of six
The Cascade
Which rule wins is a scoring system, not reading order, and which properties pass down the tree is largely arbitrary history. Both are permanent.
The rest of the chain
Five other stages01 Origins
One machine at CERN.
02 Resolution
Turning a name into an address.
03 Trust
Why the padlock means anything.
04 Rendering
From bytes to pixels.
06 Where Browsers Differ
The gap between spec and behaviour.