facilitate touch interaction testing

[declann]

To test touch/mobile interaction on visuals using my desktop, I need to use desktop browser devtools (fine) but I also need to set touch-action: none on the svg container. Should this be a default?

Without the setting, I cannot pan in examples like the scatterplot pan & zoom.

Not sure if this is too simplified as I haven't considered a big range of scenarios.

https://developer.mozilla.org/en-US/docs/Web/CSS/touch-action

[domoritz]

I'm a bit confused by a lot of the touch vs mouse handling in browsers to be honest so I would be happy to defer to your judgement as to what is right here.

[declann]

I too am very confused. Amit Patel writes some excellent content about these edgy bits in this post: https://www.redblobgames.com/making-of/draggable/#fix-scroll Perhaps I'll get to test a change and a simple PR - when I get a bit more comfortable.

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