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Our internal ESLint config says
ecmaVersion: 2018, but still allows syntax from ES2019+ since we also use@babel/parser.This PR changes to using the default parser, except for react and flow where we use babel (for JSX and type annotations).
At some point we could bump
ecmaVersionto be able to use newer language features, but right now that’s an unnecessary potentially breaking change. We only test supported Node.js in GitHub Actions, but I just tested manually and eslint-config-prettier still works in Node.js 12 which is just two LTS behind. Given eslint-config-prettier’s popularity I see no reason to break that for now.See the individual commits for details.