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Supper Club × ESLint with Nicholas Zakas
Syntax - Tasty Web Development Treats
The Future of ESLint
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The scopes are not necessarily represented in the AST, like that's a concept, it's not part of the syntax. And so we actually do scope analysis as part of running the ESLint on a file as well. A rule can say, okay, give me the scope that's related to this particular node. That scope then contains things like variable declarations, variable references, and stuff like that that you can use to implement that no shadow rule that you mentioned.
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