Babel とは？

• JavaScript ソースを変換する。
• TypeScript の transpile にも使用できるっぽい？(通常は tsc --build)

問題 「Error: Requires Babel "^7.0.0-0", but was loaded with "6.26.3"」 (2021-08-02)

• 概要

Error: Requires Babel "^7.0.0-0", but was loaded with "6.26.3". If you are sure you have a compatible version of @babel/core, it is likely that something in your build process is loading the wrong version. Inspect the stack trace of this error to look for the first entry that doesn't mention "@babel/core" or "babel-core" to see what is calling Babel. (While processing preset: "C:\Users\irisa\workspace\s3-test-websites\node_modules\@babel\preset-env\lib\index.js")

• 対処

yarn remove babel-cli
yarn add --dev @babel/cli