Alexander Li issues

Results 3 issues of


                                            Alexander Li

Syntax error triggered by onWindowDragEnd defined in Tree.tsx

Within functionality [onWindowDragEnd](https://github.com/react-component/tree/blob/master/src/Tree.tsx#L701), it passes `null` into [onNodeDragEnd](https://github.com/react-component/tree/blob/master/src/Tree.tsx#L706). calling `node.props` here will result in an error. As in this case, `node` is `null`. @zombieJ Can any of the owners take...

How can we programmatically trigger tree node expanding with loading spinner displayed?

Asynchronously load tree data, loading spinner won't be displayed if we invoke `setExpandedKeys` to expand a specific tree node and subsequent ajax request. How?

loadData promise will be triggered twice if it's been rejected directly without appending child nodes.

Hey mate, I can reproduce this issue in the following sandbox. Can anyone help take a look at this? https://codesandbox.io/s/gallant-darkness-c8uvw?file=/App.jsx:1953-1954 You can see that console will print out two batches...