This example allows users to right-click on a word and see the definition on the side panel using the Side Panel API.

NOTE: This example only defines the word extensions and popup.

When the user selects a word, we need to send it to the side panel, but that may not be open yet. To handle this we store the word in chrome.storage.session, which results in the following:

• If the side panel is already open, the storage.session.onChanged event will fire in the side panel.
• Otherwise, the value will be loaded from storage when the side panel opens.

1. Clone this repository.
2. Load this directory in Chrome as an unpacked extension.
3. Go to https://developer.chrome.com/docs/extensions/
4. Right-click on the "Extensions" word.
5. Choose the "Define" context menu

You should see the definition on the side panel