# Advanced Usage

## Running a specific task[​](#running-a-specific-task "Direct link to Running a specific task")

If you want to run the workflow to retrieve the output of another task, you can use `Client.runTask()`:

```
const results = await client.runTask('infer_yolo_v8', {
  inputs: [
    'https://raw.githubusercontent.com/Ikomia-dev/notebooks/main/examples/img/img_work.jpg',
  ],
});
```

## Advanced configuration and output selection[​](#advanced-configuration-and-output-selection "Direct link to Advanced configuration and output selection")

If you need to select outputs from various tasks or set parameters for intermediate tasks, you can use a `Context` object for maximum flexibility:

```
const context = await client.buildContext();
```

A context holds specific configuration for your deployment, which you can reuse across multiple runs.

Using `context.addOutput()`, you can select specific outputs from any task in your workflow:

```
// Add ALL outputs from the "ocv_blur" task
context.addOutput('ocv_blur');

// Add output 1 from "infer_yolo_v8"
context.addOutput('infer_yolo_v8', {index: 1});

// Add ALL outputs from the "infer_yolo_v8_seg" task
// Save them to project's storage (will be returned as StorageObjectIO)
context.addOutput('infer_yolo_v8_seg', {saveTemporary: true});
```

You can also use `context.setParameters()` to edit configuration of any task:

```
context.setParameters('infer_yolo_v8', {conf_thres: 0.5});
```

To run using a context, you can pass it to the `Client.runOn()` method:

```
const results = await client.runOn(context, {
  inputs: [
    'https://raw.githubusercontent.com/Ikomia-dev/notebooks/main/examples/img/img_work.jpg',
  ],
});
```

## Chaining deployments[​](#chaining-deployments "Direct link to Chaining deployments")

You can chain multiple deployments together by passing the outputs of one deployment as inputs to another:

```
const client1 = new Client({url: 'https://your.scale.endpoint.url'});
const client2 = new Client({url: 'https://your.other.scale.endpoint.url'});

const results1 = await client1.run({
  inputs: [
    'https://raw.githubusercontent.com/Ikomia-dev/notebooks/main/examples/img/img_work.jpg',
  ],
});
const results2 = await client2.run({inputs: [results1]});
```

You can also forward selected outputs using `results.getOutput()`:

```
const results1 = await client1.run({
  inputs: [
    'https://raw.githubusercontent.com/Ikomia-dev/notebooks/main/examples/img/img_work.jpg',
  ],
});
const results2 = await client2.run({
  inputs: [results1.getOutput(1), results1.getOutput(2)],
});
```