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Uncaught TypeError: Cannot read property 'alternate' of undefined

See original GitHub issue

I’m getting this error with the example code in the readme using the latest react-konva (1.6.4), konvajs (1.7.6) and react (16.1.1) versions with typescript:

Uncaught TypeError: Cannot read property 'alternate' of undefined
    at isFiberMountedImpl (react-reconciler.development.js:130)
    at isFiberMounted (react-reconciler.development.js:158)
    at findCurrentUnmaskedContext (react-reconciler.development.js:1091)
    at getContextForSubtree (react-reconciler.development.js:6861)
    at Object.updateContainer (react-reconciler.development.js:6941)
    at Stage.componentDidMount (react-konva.js:396)
    at vendor.js?v=OjVxDpV6p_Jfz2P38F_R2lc3pjVsUisUejeIABZq7AE:29697
    at measureLifeCyclePerf (vendor.js?v=OjVxDpV6p_Jfz2P38F_R2lc3pjVsUisUejeIABZq7AE:29508)
    at vendor.js?v=OjVxDpV6p_Jfz2P38F_R2lc3pjVsUisUejeIABZq7AE:29696
    at CallbackQueue.notifyAll (vendor.js?v=OjVxDpV6p_Jfz2P38F_R2lc3pjVsUisUejeIABZq7AE:18480)

Issue Analytics

State:
Created 6 years ago
Comments:8 (2 by maintainers)

Top GitHub Comments

4reactions

lavrtoncommented, Mar 25, 2021

You need to match react and react-konva versions. react-konva depends on some react internals, so matching versions are important. If versions are not matching you must see a peerDependency warning in the terminal when you install react-konva with npm (probably yarn shows that warning too).

The best way to solve the issue, is to install the lastest versions of react, react-dom and react-konva.

npm install react@latest react-dom@latest react-konva@latest

If you don’t want to upgrade react, you can use the lower version of react-konva.

npm install react-konva@16

0reactions

souldjlcommented, Apr 25, 2022

same error here, trying the basic example from the readme. i dont know how to reslove it “react”: “^16.13.0”, “react-dom”: “^17.0.2”, “react-konva”: “^16.8.6”, “konva”: “^8.3.5”,