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[Home](./index.md) &gt; [com-tools](./com-tools.md) &gt; [copyConstructor](./com-tools.copyconstructor.md)

## copyConstructor() function

拷贝构造函数，与 copyFunction 相比，该函数还会还原构造函数的继续链，即 prototype

**Signature:**

```typescript
export declare function copyConstructor<F extends Function>(fun: F): F;
```

## Parameters

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Parameter


</th><th>

Type


</th><th>

Description


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<tbody><tr><td>

fun


</td><td>

F


</td><td>


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**Returns:**

F

