TypeError: mobx.defineProperty is not a function #1909

davetapley · 2022-05-13T17:09:40Z

davetapley
May 13, 2022

Putting this here for Google in case it catches others out

I bumped mobx-state-tree in my package.json and started getting:

TypeError: mobx.defineProperty is not a function

Answered by davetapley

Check npm install for:

npm WARN [email protected] requires a peer of mobx@^6.3.0 but none is installed. You must install peer dependencies yourself.

Then update your package.json to have:

"mobx": "^6.3.0",

Then npm install again and restart everything.

davetapley · 2022-05-13T17:10:26Z

Check npm install for:

npm WARN [email protected] requires a peer of mobx@^6.3.0 but none is installed. You must install peer dependencies yourself.

Then update your package.json to have:

"mobx": "^6.3.0",

Then npm install again and restart everything.

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