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← All coursesModern CSS: What The Browser Took Back5 levels · 24 lessons

9999 was a guess~11 min
The rule is in the file and nothing happened~9 min
The number went up every quarter~10 min
Sixty times a second, to confirm the box had not moved~9 min
A container cannot query itself~8 min
Two arrows and a row of dots~9 min
Delete the JavaScript · Review~5 min

The child that finally lines up~9 min
container-type is a sizing decision~8 min
What :has() weighs~7 min
Asking an element whether it is stuck~7 min
Nobody will notice, which is the point~8 min
Components that know their context · Review~5 min

An unlayered rule beats every layered one~8 min
& resolves through an implicit :is()~7 min
Proximity is not encapsulation~7 min
The cascade above specificity · Review~5 min

What a group weighs~8 min
Physical and logical are separate properties~6 min
Specificity arithmetic · Review~5 min

Invalid at computed-value time is not initial~7 min
Why lightening a hex by 10% goes muddy~7 min
style(--x) means differs from initial~7 min
Values that compute · Review~5 min

Course

Modern CSS: What The Browser Took Back

Four jobs you still do in JavaScript that the browser now does for you.

Start free: 9999 was a guess