Andrey (azangru) wrote,
Andrey
azangru

CSS surprized me today.

Make a container and put some text in it:



then add a negative margin to the heading, so that it become outdented:



no surprises so far:



Now add an overflow-y: auto to the container so that its content could scroll down. The moment you do this, the hanging part of the heading gets cropped by the border of the container:



Overflow-x: visible doesn't help. There must be a spec somewhere that explains why this is the correct behavior; i.e. why overflow-x starts behaving as if it were set to hidden; but it's so unintuitive it's bewildering.

(example in jsfiddle)

Of course the desired effect can still be achieved through a combination of padding and negative margin, but still — yikes!
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