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# no-unsafe-assignment

[Added in v0.1.4](https://github.com/web-infra-dev/rslint/releases/tag/v0.1.4)
## Configuration

| Preset                              | Configured Value |
| ----------------------------------- | ---------------- |
| ✅ ts.configs.recommendedTypeChecked | `"error"`        |
| ✅ ts.configs.strictTypeChecked      | `"error"`        |


```ts title=rslint.config.ts
import { defineConfig, ts } from '@rslint/core';

export default defineConfig([
  ts.configs.recommended,
  {
    rules: {
      '@typescript-eslint/no-unsafe-assignment': 'error',
    },
  },
]);
```

## Rule Details

Disallow assigning a value with type `any` to variables and properties.

Assigning an `any`-typed value to a variable or property circumvents TypeScript's type checking. This rule flags unsafe assignments including direct assignments, variable declarations, array destructuring with `any` elements, object destructuring with `any` properties, and array spreads of `any`-typed values.

Examples of **incorrect** code for this rule:

```typescript
const x = 1 as any;
const [y] = [1] as any;
const [z] = [1 as any];

function fn(arg: any) {
  const val: string = arg;
}
```

Examples of **correct** code for this rule:

```typescript
const x = 1;
const [y] = [1];
const val: unknown = someAnyValue;

function fn(arg: string) {
  const val: string = arg;
}
```

## Original Documentation

- [typescript-eslint: no-unsafe-assignment](https://typescript-eslint.io/rules/no-unsafe-assignment)
- [Source code](https://github.com/typescript-eslint/typescript-eslint/blob/v8.65.0/packages/eslint-plugin/src/rules/no-unsafe-assignment.ts)