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76 lines
1.4 KiB
Text
76 lines
1.4 KiB
Text
---
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description: 'Disallow member access on a value with type `any`.'
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---
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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-member-access** for documentation.
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Despite your best intentions, the `any` type can sometimes leak into your codebase.
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Member access on `any` typed variables is not checked at all by TypeScript, so it creates a potential safety hole, and source of bugs in your codebase.
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## Rule Details
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This rule disallows member access on any variable that is typed as `any`.
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Examples of code for this rule:
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<!--tabs-->
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### ❌ 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.a;
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anyVar.a.b;
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anyVar['a'];
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anyVar['a']['b'];
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nestedAny.prop.a;
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nestedAny.prop['a'];
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const key = 'a';
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nestedAny.prop[key];
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// Using an any to access a member is unsafe
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const arr = [1, 2, 3];
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arr[anyVar];
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nestedAny[anyVar];
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```
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### ✅ Correct
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```ts
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declare const properlyTyped: { prop: { a: string } };
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properlyTyped.prop.a;
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properlyTyped.prop['a'];
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const key = 'a';
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properlyTyped.prop[key];
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const arr = [1, 2, 3];
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arr[1];
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const idx = 1;
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arr[idx];
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arr[idx++];
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```
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## Options
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```jsonc
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// .eslintrc.json
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{
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"rules": {
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"@typescript-eslint/no-unsafe-member-access": "error"
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}
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}
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```
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This rule is not configurable.
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## Related To
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- [`no-explicit-any`](./no-explicit-any.md)
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