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Any type

The any type is a special type (universal supertype) that can be used to represent any type of value (primitives, objects, arrays, functions, errors, symbols). It is often used in situations where the type of a value is not known at compile time, or when working with values from external APIs or libraries that do not have TypeScript typings.

By utilizing any type, you are indicating to the TypeScript compiler that values should be represented without any limitations. In order to maximizing type safety in your code consider the following:

  • Limit the usage of any to specific cases where the type is truly unknown.
  • Do not return any types from a function as you will lose type safety in the code using that function weakening your type safety.
  • Instead of any use @ts-ignore if you need to silence the compiler.
let value: any;
value = true; // Valid
value = 7; // Valid