We're working on polishing our product performance-wise, and have identified a couple of small issues with this (awesome!) library that we'd like you guys to address. Luckily, both are pretty trivial to fix:

This one originates here:
https://github.com/react-grid-layout/react-draggable/blob/master/lib/Draggable.js#L239

An unconditional setState in a lifecycle. Something like this would fix that:

componentWillUnmount() {
    if (this.state.dragging) {
        this.setState({dragging: false}); // prevents invariant if unmounted while dragging
    }
}

Sometimes we get "forced reflow" alerts like these:

Those originates here:
https://github.com/react-grid-layout/react-draggable/blob/master/lib/DraggableCore.js#L261

Wrapping the DOM mutation in a rAF would fix that:

if (this.props.enableUserSelectHack) {
    requestAnimationFrame(() => {
        removeUserSelectStyles(ownerDocument);
    });
}