Re: [fxtf-drafts] [geometry-1] DOMMatrixInit can report false `is2D` (#600)

That's as intended. `is2D` is not a property of the numbers themselves, but a marker of whether the matrix *originated* from 3d transforms or not, as that affects how the serialization works. See [the definition of "is 2D"](https://drafts.fxtf.org/geometry-1/#matrix-is-2d) and [the stringifier](https://drafts.fxtf.org/geometry-1/#dommatrixreadonly-stringification-behavior).  A 3d transform can be, *at the moment*, equivalent to a 2d transform.

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Received on Sunday, 29 June 2025 22:45:04 UTC