vue-jstree
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Remove duplicate onItemToggle call
onItemToggle call is supposed to be invoked via watch 'model.opened' handler. The onItemToggle call in handleItemToggle is duplicated. Please review.
I started using this component (it's great btw :)) and I noticed the same thing. This PR definitely fixes it, but I don't know if it has any impacts on other functions.
fix dragstart to pass empty string for IE instead of null in e.dataTransfer.setData.