# fetch-api-progress

Upload and download progress for [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API).

## Getting started

### Upload progress

```typescript
import { trackRequestProgress } from "fetch-api-progress";

const blob = new Blob([new Uint8Array(5 * 1024 * 1024)]);

const request = {
  headers: {
    "Content-Type": "application/octet-stream"
  },
  method: "PUT",
  body: blob
};

const trackedRequest = trackRequestProgress(request, (progress) => {
  console.log(
    `Uploaded ${progress.loaded} bytes out of ${progress.total ?? "unknown"}`
  );
});

const response = await fetch("https://httpbin.org/put", trackedRequest);
```

### Download progress

```typescript
import { trackResponseProgress } from "fetch-api-progress";

const response = await fetch("https://httpbin.org/put", {
  headers: {
    "Content-Type": "application/octet-stream"
  },
  method: "PUT",
  body: blob
});

const trackedResponse = trackResponseProgress(response, (progress) => {
  console.log(
    `Downloaded ${progress.loaded} bytes out of ${progress.total ?? "unknown"}`
  );
});

// Read the response. E.G. with a function from https://github.com/teil-one/fetch-api-progress/blob/main/tests/node/response/tracked.test.mjs
await readResponse(trackedResponse);
```

## Supported platforms

| Tracking progress of | Chrome | Edge | Safari | Firefox | Node.js |
| -------------------- | ------ | ---- | ------ | ------- | ------- |
| Request              | ✅     | ✅   | ✅     | ❌      | ✅      |
| Response             | ✅     | ✅   | ✅     | ✅      | ✅      |

## Integrations

Can be used with [api-registry](https://www.npmjs.com/package/api-registry#track-progress) – an HTTP API client.

[GitHub](https://github.com/teil-one/fetch-api-progress) · [NPM package](https://www.npmjs.com/package/fetch-api-progress)