Native shift + right click on non-canvas makes shift stuck for the viewer

[NiklasPor]

Describe the bug
When you right-click outside of the canvas with xeokit while pressing the shift, the browser context menu will open. Once you're going back into the canvas, all controls will behave like shift is still pressed, even though you let go of it while pressing the context menu.

Fix: In the following code, keyboard button status is only updated if keyup is fired. keyup never fires, if the users hits shift and then opens the context menu via right click (then the contextmenu event fires).

xeokit-sdk/src/viewer/scene/input/Input.js

Lines 1067 to 1082 in e9c8daf

	this._keyboardEventsElement.addEventListener("keyup", this._keyUpListener = (e) => {
	if (!this.enabled || (!this.keyboardEnabled)) {
	return;
	}
	if (e.target.tagName !== "INPUT" && e.target.tagName !== "TEXTAREA") {
	if (e.keyCode === this.KEY_CTRL) {
	this.ctrlDown = false;
	} else if (e.keyCode === this.KEY_ALT) {
	this.altDown = false;
	} else if (e.keyCode === this.KEY_SHIFT) {
	this.shiftDown = false;
	}
	this.keyDown[e.keyCode] = false;
	this.fire("keyup", e.keyCode, true);
	}
	});

To Reproduce

1. Go to https://jsfiddle.net/o6Lzvu58/2/
2. Click on shift + right click in the right area to open the context menu
3. Let go of shift
4. Close the context menu
5. Now the viewer still behaves like shift is pressed
6. Once you hit shift again on your keyboard everything will work again

Screen.Recording.2025-11-05.at.12.19.08.mov

Desktop (please complete the following information):

• MacOS
• Chrome