Only drag zoom on left mouse button #671
Merged
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This makes drag act the same as pan (which is implemented by Hammer.js, which - as far as I can tell - automatically only listens to the left / primary mouse button).
By default, right-click is intercepted by the browser to display a context menu, so this isn't noticeable, However, if
oncontextmenu
is used to disable that (e.g., to use JS to display a menu instead), then right-click can trigger zoom, which feels strange.