Comments (3)
The problem with the mobile device emulator is that it doesn’t pass our test for touch support:
Lines 21 to 23 in 44af703
It seems that if you enable the device emulator and then reload, the top-level window does pass: "ontouchstart" in window
is true. However, the same test is false for HTML elements such as the BODY and the CANVAS, so D3 assumes that touch events are unsupported and does not register touch event listeners. (See 870498d #35 for context.)
Curiously enough, you also can’t assign a touch event listener using element.ontouchstart in the device emulator. You can however use element.addEventListener for touchstart events!
So, I consider this a bug in Chrome’s device emulator. If it’s not possible to detect whether touch may be possible, then we’d have to go back to always registering touch event listeners, which would then cause a passive event listener warning.
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OK. It's probably linked to the fact that touch events are still in level 2.
Since it's still a bit problematic, may I propose to add an option to allow overriding the autodetection ? See pull request #42 .
I tested it in my project and it seems to work perfectly when enabling the touch events in Chrome.
from d3-drag.
Released drag.touchable in 1.2.0. Thanks!
from d3-drag.
Related Issues (20)
- Possible typo in README HOT 2
- What are the perposes of functions yesdrag and nodrag?
- Drag event on Chrome 72 HOT 3
- d3 mouseup event not firing HOT 1
- Drag Event Issue on Windows Chrome 74, related to solution for #47 HOT 1
- The default filter should return false if event.ctrlKey. HOT 5
- drag start event is don't send when Ctrl-key is press HOT 1
- drag.on("init") ? HOT 7
- Click event not firing if drag enables with simulation HOT 1
- Non-cancelable event HOT 3
- remove drag.container? HOT 1
- Use native events (*element*.dispatchEvent) instead of d3-dispatch? HOT 1
- remove dragEvent.on?
- d3.event is not available in version 6.1.1 HOT 1
- DragEvent missing event.currentTarget for arrow function node selection HOT 1
- Make event listeners non-passive. HOT 2
- d3.drag() causes error in testing mousedown event via jsdom HOT 4
- d3.pointer() could use event.touches[0] HOT 2
- Add event.currentTarget
- Support d3.drag in testing environments
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