Test Webiew View API finalization

[mjbvz]

Refs #46585

• Mac @roblourens
• Linux @sbatten
• Windows: @eamodio

Complexity: 5

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Overview

The webview view API has now been finalized. In this plan item, try going through to test the api and the experience of writing an extension for it

• Start with the webview view extension sample

• Review the docs for the new apis in vscode.d.ts

• Look at webview view lifecycle (and showing and hiding view)

  • Does the dispose lifecycle make sense?
  • Are events for show/hide fired when you expect?

• Look at state management for the webview views

  • Make sure that webview state is persisted when: vscode is reloaded, a view is collapsed, a view is moved, a view is hidden.
  • Try using retainContextWhenHidden. When this is enabled, then switching so that the webview is no longer visible should preserve the iframe context itself.

[roblourens]

Are there going to be some docs about this on the website?