typescript noImplicitAny

时间: 2024-09-19 23:52:50

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No Implicit Any - noImplicitAny

In some cases where no type annotations are present, TypeScript will fall back to a type of any for a variable when it cannot infer the type.

This can cause some errors to be missed, for example:

function fn(s) {

  // No error?

  console.log(s.subtr(3));

}

fn(42);

Turning on noImplicitAny however TypeScript will issue an error whenever it would have inferred any:

function fn(s) {

  //Parameter 's' implicitly has an 'any' type.

  console.log(s.subtr(3));

}