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babel/plugin-proposal-optional-chaining works for tests but not for prod code · Issue #10799 · babel/babel · GitHub
![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/25108668/44774972-19ba1300-ab92-11e8-813b-107f965b16d9.png)
after adding @babel/plugin-proposal-class-properties in same error · Issue #8577 · babel/babel · GitHub
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How to quickly transpile JavaScript using Babel alone? A brief introduction to Babel.js. | by Uday Hiwarale | JsPoint | Medium
![дэн on Twitter: "If you're writing a Babel beginner tutorial please use package.json instead of .babelrc. Hidden files are so easy to miss. https://t.co/USe7CmRaou" / Twitter дэн on Twitter: "If you're writing a Babel beginner tutorial please use package.json instead of .babelrc. Hidden files are so easy to miss. https://t.co/USe7CmRaou" / Twitter](https://pbs.twimg.com/media/C4eDDTmWMAAJaSx.jpg)
дэн on Twitter: "If you're writing a Babel beginner tutorial please use package.json instead of .babelrc. Hidden files are so easy to miss. https://t.co/USe7CmRaou" / Twitter
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