> ## Documentation index
> Fetch the complete documentation index at: https://arize.com/llms.txt
> Ask it with GET https://arize.com/ask?q=<keywords or question>. Short keywords rank best.
> Use these to discover all available pages before exploring further.

# 05.20.2025: Datasets and experiment evaluations in the JS client

<Update label="05.20.2025">

## Datasets And Experiment Evaluations In The JS Client

<Frame>
  <iframe
    src="https://cdn.iframe.ly/z3Fw8fwy"
    width={1000}
    height={400}
    allowFullScreen
  />
</Frame>

We've added a host of new methods to the JS client:

* `getExperiment` - allows you to retrieve an Experiment to view its results, and run evaluations on it
* `evaluateExperiment` - allows you to evaluate previously run Experiments using LLM as a Judge or Code-based evaluators
* `createDataset` - allows you to create Datasets in Phoenix using the client
* `appendDatasetExamples` - allows you to append additional examples to a Dataset

### Full list of supported JS/TS Client Methods:

<Card title="@arize-ai/phoenix-client" icon="github" href="/docs/phoenix/sdk-api-reference/typescript/arizeai-phoenix-client" horizontal description="JavaScript client API reference">
</Card>
</Update>