Page components
All pages are made up of certain common components. The basic elements of a page object are the page triggers, page properties, page layout controls with their triggers and properties, and page actions.
In this section, we will first focus on page triggers and properties, and apply our knowledge to update our WDTU Radio Show extension. After that, we will continue with page layout controls, then update the extension once again, and finally look at page actions.
Page triggers
The following screenshot shows page triggers. Note that the OnQueryClosePage trigger isn’t related to any query object action:
Figure 4.25 – Page triggers
Tip
The Microsoft docs do not provide an overview article about page triggers. An easy way of looking up any individual page trigger from Visual Studio Code is to select its name through IntelliSense, then hover over the pasted trigger name and press Get help.
In general, according to...
