How do you implement file uploads in React Native?

Question

Accepted Answer

**Using fetch:**
```tsx
async function uploadFile(uri: string) {
  const formData = new FormData();
  formData.append("file", {
    uri,
    name: "photo.jpg",
    type: "image/jpeg",
  } as any);

const response = await fetch("https://api.example.com/upload", {
    method: "POST",
    body: formData,
    headers: {
      "Content-Type": "multipart/form-data",
    },
  });

return response.json();
}
```

**Progress tracking:**
```tsx
import { upload } from "react-native-blob-util";

const result = await upload({
  url: "https://api.example.com/upload",
  method: "POST",
  path: filePath,
  onProgress: (sent, total) => {
    setProgress(sent / total);
  },
});
```

**Tips:**
- Handle file permissions
- Compress large files
- Show upload progress

React Native: How do you implement file uploads in React Native?