---
url: /viewer/examples/context_plugins.md
---
# Global and Local Context Plugins
This example shows how to communicate from different plugins across the BIMDataViewer window layout using the `globalContext` and the `localContext`.
### Demo
### HTML
```html
BIMDataViewer
```
:::tip
Notice that [PluginInstances](../reference/plugin.html#plugin-instance) and [PluginComponentInstances](../reference/plugin.html#plugin-component-instance) (the entities returned by `localContext.plugins` or `globalContext.plugins`) do not use the same API to open the plugin. Also, `globalContext.pluginInstances` return an Array of [PluginInstances](../reference/plugin.html#plugin-instance) because the same plugin can be instantiated many times on different [Windows](../reference/window.html).
:::