![Configure Parcel JS and Babel to use JavaScript proposal class properties | Jamstack developer | Rob Kendal Configure Parcel JS and Babel to use JavaScript proposal class properties | Jamstack developer | Rob Kendal](https://robkendal.co.uk/img/using-proposal-class-properties-blog-post.png)
Configure Parcel JS and Babel to use JavaScript proposal class properties | Jamstack developer | Rob Kendal
![Solved] Though the "loose" option was set to "false" in your @babel/preset-env config, it will not be used for @babel/plugin-proposal-private-property-in-object since the "loose" mode option was set to "true" for @babel/plugin -proposal-private-methods Solved] Though the "loose" option was set to "false" in your @babel/preset-env config, it will not be used for @babel/plugin-proposal-private-property-in-object since the "loose" mode option was set to "true" for @babel/plugin -proposal-private-methods](https://exerror.com/wp-content/uploads/2021/08/false-in-your-babel-preset-env-config-1200x679.jpg)
Solved] Though the "loose" option was set to "false" in your @babel/preset-env config, it will not be used for @babel/plugin-proposal-private-property-in-object since the "loose" mode option was set to "true" for @babel/plugin -proposal-private-methods
![babel/proposal-class-properties is not compatible with Windows OS · Issue #11999 · babel/babel · GitHub babel/proposal-class-properties is not compatible with Windows OS · Issue #11999 · babel/babel · GitHub](https://user-images.githubusercontent.com/59353019/91041304-6aec2880-e62d-11ea-9cdc-db6ffa7d172c.png)
babel/proposal-class-properties is not compatible with Windows OS · Issue #11999 · babel/babel · GitHub
after adding @babel/plugin-proposal-class-properties in same error · Issue #8577 · babel/babel · GitHub
![Line 0: Parsing error: Cannot find module 'babel-plugin-transform-class- properties' · Issue #12181 · facebook/create-react-app · GitHub Line 0: Parsing error: Cannot find module 'babel-plugin-transform-class- properties' · Issue #12181 · facebook/create-react-app · GitHub](https://user-images.githubusercontent.com/52759812/159049636-d25ff02c-55ab-4e30-9e42-0b6522296b2b.png)
Line 0: Parsing error: Cannot find module 'babel-plugin-transform-class- properties' · Issue #12181 · facebook/create-react-app · GitHub
![Babel's Transform Class Properties Plugin: How it Works and What it Means for your React Apps | by Jacob Worrel | Medium Babel's Transform Class Properties Plugin: How it Works and What it Means for your React Apps | by Jacob Worrel | Medium](https://miro.medium.com/max/1838/1*gOBl1ekYCAPJ9WiwydOm_w.jpeg)
Babel's Transform Class Properties Plugin: How it Works and What it Means for your React Apps | by Jacob Worrel | Medium
GitHub - naver/babel-plugin-no-side-effect-class-properties: This plugin transforms static class properties so that side effects do not occur and tree-shaking is activated.
![reactjs - Add @babel/plugin-proposal-class-properties (https://git.io/vb4SL) to the 'plugins' section of your Babel config to enable transformation - Stack Overflow reactjs - Add @babel/plugin-proposal-class-properties (https://git.io/vb4SL) to the 'plugins' section of your Babel config to enable transformation - Stack Overflow](https://i.stack.imgur.com/hGtib.png)
reactjs - Add @babel/plugin-proposal-class-properties (https://git.io/vb4SL) to the 'plugins' section of your Babel config to enable transformation - Stack Overflow
![after adding @babel/plugin-proposal-class-properties in same error · Issue #8577 · babel/babel · GitHub after adding @babel/plugin-proposal-class-properties in same error · Issue #8577 · babel/babel · GitHub](https://user-images.githubusercontent.com/25108668/44773593-9945e300-ab8e-11e8-8bf6-f23ddedd1737.png)