---
description: 'Disallow calling a value with type `any`.'
---
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> 🛑 This file is source code, not the primary documentation location! 🛑
>
> See **https://typescript-eslint.io/rules/no-unsafe-call** for documentation.
The `any` type in TypeScript is a dangerous "escape hatch" from the type system.
Using `any` disables many type checking rules and is generally best used only as a last resort or when prototyping code.
Despite your best intentions, the `any` type can sometimes leak into your codebase.
Calling an `any`-typed value as a function creates a potential type safety hole and source of bugs in your codebase.
This rule disallows calling any value that is typed as `any`.
## Examples
```ts
declare const anyVar: any;
declare const nestedAny: { prop: any };
anyVar();
anyVar.a.b();
nestedAny.prop();
nestedAny.prop['a']();
new anyVar();
new nestedAny.prop();
anyVar`foo`;
nestedAny.prop`foo`;
```
```ts
declare const typedVar: () => void;
declare const typedNested: { prop: { a: () => void } };
typedVar();
typedNested.prop.a();
(() => {})();
new Map();
String.raw`foo`;
```
## The Unsafe `Function` Type
The `Function` type is behaves almost identically to `any` when called, so this rule also disallows calling values of type `Function`.
```ts
const f: Function = () => {};
f();
```
Note that whereas [no-unsafe-function-type](./no-unsafe-function-type.mdx) helps prevent the _creation_ of `Function` types, this rule helps prevent the unsafe _use_ of `Function` types, which may creep into your codebase without explicitly referencing the `Function` type at all.
See, for example, the following code:
```ts
function callUnsafe(maybeFunction: unknown): string {
if (typeof maybeFunction === 'function') {
// TypeScript allows this, but it's completely unsound.
return maybeFunction('call', 'with', 'any', 'args');
}
// etc
}
```
In this sort of situation, beware that there is no way to guarantee with runtime checks that a value is safe to call.
If you _really_ want to call a value whose type you don't know, your best best is to use a `try`/`catch` and suppress any TypeScript or linter errors that get in your way.
```ts
function callSafe(maybeFunction: unknown): void {
try {
// intentionally unsound type assertion
(maybeFunction as () => unknown)();
} catch (e) {
console.error(
'Function either could not be called or threw an error when called: ',
e,
);
}
}
```
## When Not To Use It
If your codebase has many existing `any`s or areas of unsafe code, it may be difficult to enable this rule.
It may be easier to skip the `no-unsafe-*` rules pending increasing type safety in unsafe areas of your project.
You might consider using [ESLint disable comments](https://eslint.org/docs/latest/use/configure/rules#using-configuration-comments-1) for those specific situations instead of completely disabling this rule.
## Related To
- [`no-explicit-any`](./no-explicit-any.mdx)
- [`no-unsafe-argument`](./no-unsafe-argument.mdx)
- [`no-unsafe-assignment`](./no-unsafe-assignment.mdx)
- [`no-unsafe-member-access`](./no-unsafe-member-access.mdx)
- [`no-unsafe-return`](./no-unsafe-return.mdx)