JS `const` should never be used for anything but constants. Using `const` to mean the variable happens not to be reassigned makes your code less readable, not more.https://twitter.com/ShannonL_Miller/status/1050564581830082562 …
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If you use TypeScript or Flow you can mark values as readonly. Then with const and readonly you have a guarantee that it's not been pointed at a new reference and hasn't been mutated.
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