It's unfortunate that ?. is sugar for x !== undefined and not typeof x !== 'undefined'. The subtle difference is that the first one will fail if x is not defined at all.
Would it make sense to disallow the operator unless the variable is in the scope?
Fail
iDontExist?.meNeither
Pass
globalThis.iDontExist?.meNeitherlet iDontExist;
iDontExist?.meNeither
sindresorhus / eslint-plugin-unicorn
More than 100 powerful ESLint rules
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