![This Error is coming "Cannot add property count, object is not extensible" while running LWC - YouTube This Error is coming "Cannot add property count, object is not extensible" while running LWC - YouTube](https://i.ytimg.com/vi/MUBc02OLB8Q/maxresdefault.jpg)
This Error is coming "Cannot add property count, object is not extensible" while running LWC - YouTube
![React Frequently Asked Questions. Brush up on these core (and some… | by Leandro Ercoli | Bits and Pieces React Frequently Asked Questions. Brush up on these core (and some… | by Leandro Ercoli | Bits and Pieces](https://miro.medium.com/v2/resize:fit:855/0*G3OWanj3l7EVqBfe.png)
React Frequently Asked Questions. Brush up on these core (and some… | by Leandro Ercoli | Bits and Pieces
![REACT] Error after upgrading React grid version to 4.1.6: Cannot add property parentId, object is not extensible - Bryntum Support Forums REACT] Error after upgrading React grid version to 4.1.6: Cannot add property parentId, object is not extensible - Bryntum Support Forums](https://user-images.githubusercontent.com/32820446/123792493-f46d2680-d8e0-11eb-98e9-ecac52c8093e.png)
REACT] Error after upgrading React grid version to 4.1.6: Cannot add property parentId, object is not extensible - Bryntum Support Forums
![Attempting to define property on object that is not extensible. · Issue #1501 · software-mansion/react-native-gesture-handler · GitHub Attempting to define property on object that is not extensible. · Issue #1501 · software-mansion/react-native-gesture-handler · GitHub](https://user-images.githubusercontent.com/86065868/125023203-fc288a00-e09b-11eb-99c5-2e4d0ed3ad32.png)
Attempting to define property on object that is not extensible. · Issue #1501 · software-mansion/react-native-gesture-handler · GitHub
![Manz 🇮🇨⚡👾 on Twitter: "Consiguiendo así nuestra deseada inmutibilidad nativa (deeply, incluso) y haciendo mucho más lógica la sintaxis del `#`. https://t.co/b0mjUlovAh" / Twitter Manz 🇮🇨⚡👾 on Twitter: "Consiguiendo así nuestra deseada inmutibilidad nativa (deeply, incluso) y haciendo mucho más lógica la sintaxis del `#`. https://t.co/b0mjUlovAh" / Twitter](https://pbs.twimg.com/media/E4vc8ftWQAAv9dR.jpg:large)
Manz 🇮🇨⚡👾 on Twitter: "Consiguiendo así nuestra deseada inmutibilidad nativa (deeply, incluso) y haciendo mucho más lógica la sintaxis del `#`. https://t.co/b0mjUlovAh" / Twitter
![Cannot add property current, object is not extensible · Issue #227 · software-mansion/react-native-gesture-handler · GitHub Cannot add property current, object is not extensible · Issue #227 · software-mansion/react-native-gesture-handler · GitHub](https://user-images.githubusercontent.com/15834048/41899164-accc09ec-7923-11e8-832b-ee63236d174d.png)
Cannot add property current, object is not extensible · Issue #227 · software-mansion/react-native-gesture-handler · GitHub
![4.0 alpha - TypeError: Cannot add property noFallthroughCasesInSwitch, object is not extensible · Issue #9429 · facebook/create-react-app · GitHub 4.0 alpha - TypeError: Cannot add property noFallthroughCasesInSwitch, object is not extensible · Issue #9429 · facebook/create-react-app · GitHub](https://user-images.githubusercontent.com/247302/92595160-d3790d80-f29b-11ea-8a3b-38ed4f68d449.png)
4.0 alpha - TypeError: Cannot add property noFallthroughCasesInSwitch, object is not extensible · Issue #9429 · facebook/create-react-app · GitHub
TypeError: Cannot add property __, object is not extensible · Issue #12853 · storybookjs/storybook · GitHub
![javascript - The code is working fine in codeSandbox, But showing error while doing in the IDE as "can't define property "email": Object is not extensible" - Stack Overflow javascript - The code is working fine in codeSandbox, But showing error while doing in the IDE as "can't define property "email": Object is not extensible" - Stack Overflow](https://i.stack.imgur.com/JnkEm.png)