How to disable @typescript-eslint/explicit-function-return-type for some(), filter(), forEach()?

Question

How to disable @typescript-eslint/explicit-function-return-type for some(), filter(), forEach()?

It's very annoying to declare a boolean return type for some() and filter() and void for forEach() every time.

Invalid

[2, 5, 8, 1, 4].some(elem => elem > 10)

Valid

[2, 5, 8, 1, 4].some((elem):boolean => elem > 10)

I want to be able to use the first pattern (marked "invalid") without getting errors from this rule.

Answer 1

In your .eslintrc file you can add the following under rules:

{
  ...
  "plugins": ["@typescript-eslint"],
  "rules": {
    ...
    "@typescript-eslint/explicit-function-return-type": {
      "allowExpressions": true
    }
  }
}

According to the documentation on allowExpressions, this would allow you to provide inline callbacks to any function without declaring explicit return types.