4.8.13 The area element: Inconsistency between circle state and rectangle state#10306
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Psychpsyo
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May 1, 2024
This makes it so that an area's rectangle state can have rectangles with a width or height of 0, by allowing the top left corner to be identical to the bottom right instead of having to be strictly smaller. This makes it consistent with the other two states, as circles are allowed to have a radius of 0 and polygons can have all their points along a line or even in a single spot, making areas with a size of 0 possible. Fixes whatwg#10306.
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What is the issue with the HTML Standard?
The spec says that the
<area>element, in circle state, needscoordswith a non-negative radius.This means a circle with radius (and area of) 0 is perfectly valid.
Rectangle state however demands that the coordinates for the bottom right be greater than the coordinates for the top left, making a 0 width or 0 height rectangle impossible.
I understand that neither of these are things you'd actually want to use but I'm currently making a utility to create image maps and accounting for the restriction on rectangle was a bit annoying.
So, since it's also inconsistent with what is allowed for circles (and polygons even), I'd propose restricting the rectangle's bottom right to be greater or equal to the top left instead of needing to be strictly greater.
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