Tips for prohibiting the use of "any" in TypeScript declarations and interfaces

I've set the "noImplicitAny": true, flag in tsconfig.json and 

"@typescript-eslint/no-explicit-any": 2,
for eslint, but they aren't catching instances like

type BadInterface {
  property: any
}

Is there a way to configure tsconfig or eslint to catch this issue? Our team's contractors use any frequently in interface properties, and I can't seem to find a solution to prevent these from passing through tsc or eslint commands in our CI workflow.

Just to clarify, I'm looking for a method that will alert me when someone uses type any for a key on an interface or type. It seems to be overlooked when TypeScript is inferring the type from an any, but I want it to throw an error whenever any is used as a type at all.

typescripttypeseslinttsc

Answer №1

If you want to avoid explicitly using the any type in TypeScript, you can utilize the ban-types rule.

Here's an example configuration:

"@typescript-eslint/ban-types": [
  2,
  {
    "types": {
      "any": "Avoid using 'any' for safety reasons",
    },
    "extendDefaults": true,
  }
}

Check out the documentation

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