> ## Documentation Index
> Fetch the complete documentation index at: https://arizeai-433a7140.mintlify.site/llms.txt
> Use this file 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 />
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  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" />
</Update>