# Testing a Combined HTML Panel and Toolbar Plugin

You can test your in-progress plugins easily using the built-in [Script Editor ](/plugins/how-to-develop-plugins/advanced-development/setting-up-formit-for-development.md)in FormIt for Windows

We recommend using `FormIt.LoadPlugin("URL");` when testing, which loads plugins temporarily for this session (they will disappear when FormIt is restarted).

Once testing is complete, you can persist the plugin between sessions using `FormIt.InstallPlugin("URL");`.

**FormIt for Windows v17 and newer**

***

### **Toolbar Plugins**

Load your plugin into FormIt to see the latest UI and test the latest functionality:

* `FormIt.LoadPlugin("http://localhost:8080/YourPluginName");`

Make some changes, then load the plugin again using the command above.

You can load many instances of the same plugin in the current session as you test, each with its own UI.

Be sure to use the latest UI instance to ensure you're testing your most recent changes.

### **HTML Panel Plugins**

Load your plugin into FormIt to see the latest UI and test the latest functionality:

* `FormIt.LoadPlugin("http://localhost:8080/YourPluginName");`

Make some changes, then simply right-click the panel and select "Hard Reload" to reload the panel with the latest HTML, CSS, and scripts.

***

### **Preview your plugin with Plugin Manager**

Once your plugin is loaed, refer an [earlier chapter](/plugins/how-to-develop-plugins/advanced-development/previewing-a-plugin-in-the-plugin-manager.md) for this guide.

***

### **Force clearing web cache for .JSON files**

If you modify the title or description inside the manifest.json file for a plugin or repo, you may need to force clear the cache in FormIt for Windows to see those changes take effect the next time you reload the Plugin Manager.

FormIt for Windows stores its web cache here, you will need to enable hidden items in Windows Explorer to see the AppData folder.

* C:\Users\user\AppData\Local\Autodesk\FormIt 360\QtWebEngine\Default

To delete the web cache, simply delete the "Default" folder above, then reload the Plugin Manager to see the updated titles and descriptions.


---

# 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://windows.help.formit.autodesk.com/plugins/how-to-develop-plugins/additional-development-options/testing-a-combined-html-panel-and-toolbar-plugin.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

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.