> ## Documentation Index
> Fetch the complete documentation index at: https://help.dingtalk.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Developer Features (Coding Required)

> This page introduces feature configurations that require coding skills, including scheduled data retrieval, form submission entry integration, and implementing business logic through JavaScript code. Use the Developer Center to complete these tasks. Topics covered include Open APIs, frontend code access through the JS action panel, and calling external APIs from custom pages.

<Warning>
  The following feature configurations require coding skills. If you are not familiar with coding, use a zero-code solution instead.
</Warning>

## Use Cases

* Retrieve data on a schedule and send it to your own system for further processing or archiving.
* Integrate form submission and workflow initiation entries into your existing platform.
* Use the JS action panel in YiDA to write JavaScript code that implements custom business logic or conditional checks.

**Recommended:** [**Developer Center**](/open/yida/guide/about)

Contents of this chapter:

1. Open APIs
2. Frontend code access through the JS action panel
3. Calling external APIs from custom pages