TypeScript includes special types that don’t necessarily refer to any particular data type.
The any type disables type checking and allows any type to be used.
In the example below, any is not used, so an error will be thrown:
| let u = true; u = “string”; // Error: Type ‘string’ is not assignable to type ‘boolean’. Math.round(u); // Error: Argument of type ‘boolean’ is not assignable to parameter of type ‘number’. |
Assigning a variable the special type any disables type checking.
| let v: any = true; v = “string”; // no error as it can be “any” type Math.round(v); // no error as it can be “any” type |
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Using any can help bypass errors by disabling type checking, but it also means TypeScript won’t provide type safety, and tools like auto-completion will be ineffective. It’s best to avoid using any whenever possible. |