75 lines
2.0 KiB
Plaintext
75 lines
2.0 KiB
Plaintext
---
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description: 'Disallow calling a value with type `any`.'
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---
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import Tabs from '@theme/Tabs';
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import TabItem from '@theme/TabItem';
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> 🛑 This file is source code, not the primary documentation location! 🛑
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>
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> See **https://typescript-eslint.io/rules/no-unsafe-call** for documentation.
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The `any` type in TypeScript is a dangerous "escape hatch" from the type system.
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Using `any` disables many type checking rules and is generally best used only as a last resort or when prototyping code.
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Despite your best intentions, the `any` type can sometimes leak into your codebase.
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Calling an `any`-typed value as a function creates a potential type safety hole and source of bugs in your codebase.
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This rule disallows calling any value that is typed as `any`.
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## Examples
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<Tabs>
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<TabItem value="❌ Incorrect">
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```ts
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declare const anyVar: any;
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declare const nestedAny: { prop: any };
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anyVar();
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anyVar.a.b();
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nestedAny.prop();
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nestedAny.prop['a']();
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new anyVar();
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new nestedAny.prop();
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anyVar`foo`;
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nestedAny.prop`foo`;
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```
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</TabItem>
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<TabItem value="✅ Correct">
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```ts
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declare const typedVar: () => void;
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declare const typedNested: { prop: { a: () => void } };
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typedVar();
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typedNested.prop.a();
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(() => {})();
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new Map();
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String.raw`foo`;
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```
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</TabItem>
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</Tabs>
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## When Not To Use It
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If your codebase has many existing `any`s or areas of unsafe code, it may be difficult to enable this rule.
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It may be easier to skip the `no-unsafe-*` rules pending increasing type safety in unsafe areas of your project.
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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.
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## Related To
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- [`no-explicit-any`](./no-explicit-any.mdx)
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- [`no-unsafe-argument`](./no-unsafe-argument.mdx)
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- [`no-unsafe-assignment`](./no-unsafe-assignment.mdx)
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- [`no-unsafe-member-access`](./no-unsafe-member-access.mdx)
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- [`no-unsafe-return`](./no-unsafe-return.mdx)
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