In this chapter, we took a detailed look at the Web Part property pane, which is also available in classic Web Parts within SharePoint. With SharePoint Frameworks' more modern capabilities the property pane is now much more useful, as it supports both reactive and non-reactive event handling. This provides a more fluid user experience as selections and changes within the property pane can be immediately reflected in the Web Part canvas for a user.
In addition to this chapter, we implementing multi-page property panes to better categorize a scenario where you might have multiple properties to fill out.
Finally, we implemented a custom property pane field that allows us to inject custom HTML within the property pane.
In the next chapter, you'll learn to use different JavaScript frameworks, including React and Angular, as part of our SharePoint Framework web parts.