> For the complete documentation index, see [llms.txt](https://mm.ricky.moe/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mm.ricky.moe/javascript/typescript/shi-yong/partial.md).

# Partial

```typescript
type Partial<T> = { [P in keyof T]?: T[P] };
```

Partial 就是将传入的属性全部变为可选项.