nodeRef solution for React 19 does not work due to incorrect build output

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
38/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
javascript, react

Research direction

Start with lib/DraggableCore.js at the nodeRef check and compare its behavior with the compiled output shown in the issue. Run or review the linked main.spec.ts tests to reproduce the empty-ref case. Done means the built package preserves the intended nodeRef behavior and the React 19 scenario no longer falls back to findDOMNode.

Written by the indexing model from the issue text.

Description

The recommended solution for the React 19 findDOMNode removal is to provide a DOM element reference via nodeRef. This does not work due to how react-draggable is being built.

The check being done for provided nodeRef here falls back to using ReactDOM.findDOMNode when nodeRef is an empty ref ({ current: null }), which is always the initial value for DOM refs.

The source code appears to be doing the correct thing and should not result in this behavior, but the compiled code changes the behavior:

findDOMNode() {
  var _this$props$nodeRef$c, _this$props;
  return (_this$props$nodeRef$c = (_this$props = this.props) === null || _this$props === void 0 || (_this$props = _this$props.nodeRef) === null || _this$props === void 0 ? void 0 : _this$props.current) !== null && _this$props$nodeRef$c !== void 0 ? _this$props$nodeRef$c : _reactDom.default.findDOMNode(this);
}

I have some tests proving this here.

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