# JavaScript API Testing

Shoplift's JavaScript API enables you to create sophisticated A/B tests directly in your theme code, giving you complete control over test logic and visitor experiences.

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API tests require developer involvement. Most merchants will need their developer or agency to write the JavaScript and (for manual API tests) implement the trigger logic.
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To learn more about API testing, explore the documentation below.

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This guide covers basic usage of the JavaScript API for API testing purposes. For a full API reference, see [Reference](/api-reference/reference/window.shoplift.md).
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<table data-view="cards"><thead><tr><th></th><th data-hidden data-card-cover data-type="image">Cover image</th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td>Overview</td><td><a href="/files/6NlUsmV6ngRk4XReiY76">/files/6NlUsmV6ngRk4XReiY76</a></td><td><a href="/pages/JgiYma6oeuSgzqYtmqjD">/pages/JgiYma6oeuSgzqYtmqjD</a></td></tr><tr><td>Use Cases</td><td><a href="/files/k8HNdUYNd4iREC2vNdAq">/files/k8HNdUYNd4iREC2vNdAq</a></td><td><a href="/pages/ROM4SmnivJM3yLjg9KnO">/pages/ROM4SmnivJM3yLjg9KnO</a></td></tr><tr><td>Create an API Test</td><td><a href="/files/aTkxxTwYjQ7pCdRdGeRS">/files/aTkxxTwYjQ7pCdRdGeRS</a></td><td><a href="/pages/DfoGBMtJgVsz7bUAdXVH">/pages/DfoGBMtJgVsz7bUAdXVH</a></td></tr><tr><td>Previewing an API Test</td><td><a href="/files/cOQEF3gfXXWBFsQgb6f5">/files/cOQEF3gfXXWBFsQgb6f5</a></td><td><a href="/pages/6FLLgQkFF9XEny4GvnEg">/pages/6FLLgQkFF9XEny4GvnEg</a></td></tr><tr><td>Ending an API Test</td><td><a href="/files/pjhOdY8e6F3hghSfkIyS">/files/pjhOdY8e6F3hghSfkIyS</a></td><td><a href="/pages/WpOVY84lbWeP1y0RQj3G">/pages/WpOVY84lbWeP1y0RQj3G</a></td></tr></tbody></table>


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# Agent Instructions: Querying This Documentation

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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.shoplift.ai/test/javascript-api.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.