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I'm trying to implement canvas rendering in a Mendix pluggable widget using react-konva, but I'm getting the error Cannot read properties of undefined (reading 'isBatchingLegacy') at react-reconciler.development.js:17770. This appears to be caused by missing React internals that custom renderer libraries like react-konva depend on.   What I'm Trying to Achieve I'm building a planogram widget that needs to render interactive canvas elements (rectangles, images, text, drag-and-drop functionality). react-konva seemed like the perfect solution since it provides React components that render to HTML5 Canvas via Konva.js.   Root Cause Analysis After investigating, I found that Mendix's React build is missing critical internals: Standard React 18.2:   React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED = { ReactCurrentBatchConfig: {...}, ReactCurrentOwner: {...}, ReactCurrentActQueue: {...}, // ← Required by react-reconciler ReactDebugCurrentFrame: {...}, // ← Also missing in Mendix ReactCurrentDispatcher: {...} } Mendix React 18.2.0: React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED = { ReactCurrentBatchConfig: {...}, ReactCurrentOwner: {...}, ReactCurrentDispatcher: {...} // Missing: ReactCurrentActQueue, ReactDebugCurrentFrame } The error occurs because react-reconciler tries to access ReactCurrentActQueue.isBatchingLegacy but ReactCurrentActQueue is undefined in Mendix's React build.   Questions Is this a known limitation of Mendix's React build? Are there plans to restore these React internals to support custom renderer libraries? Are there any configuration options to enable full React internals for specific widgets? Environment Details Mendix Version: 10.24 Pluggable Widgets Tools: v10.15.0 react-konva: v18.0.0 konva: v9.2.0 React Version (detected): 18.2.0 (modified by Mendix)

asked 2025-09-25

1 answers