As mentioned in comment 16, this should be discussed in a spec issue -- please go ahead and open one. It's not clear to me yet what the resolution should be (for example, whether it's `touch-action` that should apply to touchpads or something new like `touchpad-action`) so it's premature to talk of tracking the implementation of anything.
Bug 1849690 Comment 18 Edit History
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As mentioned in comment 16, this should be discussed in a spec issue -- please go ahead and open one. It's not clear to me yet what the resolution should be (for example, whether it's `touch-action` that should apply to touchpads or something new like `touchpad-action`) so we're not ready yet to track the implementation of anything.