# JavascriptException error

{% hint style="warning" %}
**JavascriptException error** <mark style="color:red;">occurs when there is an error in the action script</mark>. Action scripts written in JavaScript may not properly handle changes in web page structure or may be incorrectly written from the start, which can cause this kind of error.
{% endhint %}

{% hint style="success" %}
If you purchased the action script from Listly, please contact us at [hello@listly.io](mailto:undefined) with your Listly account you used to sign up and the URL you want to extract.
{% endhint %}


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

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

```
GET https://help.listly.io/support/faq/data-extraction-errors/javascriptexception-error.md?ask=<question>
```

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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.