Question: Rerender tree when I add/delete a node about react-sortable-tree HOT 3 CLOSED

It could be that react doesn't detect the object/array change. I believe that can happen if you edit your object/array in-place.
So if you're adding via methods like:

const newTreeData = this.state.treeData;
newTreeData.push({title: 'myNewNode'});
// or
newTreeData[0].children = [{title: 'child1'}, {title: 'child2'}];
this.setState({treeData: newTreeData}); // won't update

you should instead use methods like

const newTreeData = this.state.treeData;
newTreeData = newTreeData.concat({title: 'myNewNode'});
// or
newTreeData = [
    {...newTreeData[0], children: [{title: 'child1'}, {title: 'child2'}]} // requires babel-plugin-transform-object-rest-spread
].concat(newTreeData.slice(1));
this.setState({treeData: newTreeData}); // will update

All the data manipulation methods (including node addition/removal) included in this package behave like the second bunch of examples, so if you're using those and still have a problem it might be something else.

from react-sortable-tree.

Hi @fritz-c,
Thanks for your advice, I got the point. I am using _.merge method and it mutates object, that's why it is not update. Thanks!

from react-sortable-tree.

Hi,
I am using the same, its working fine but at the end the whole tree collapsed. I tried to pass expanded in new node but seems not working.

How to pass dynamic index instead of passing 0 as hard coded?

Thanks,

from react-sortable-tree.