onCreateWindow does not work as advertised

[edwin-egalite]

Environment

Flutter version: 1.19.0-2.0.pre.173
Plugin version: 3.2.0
Android version: 9 (Pie)
iOS version: -
Xcode version: -
Device information: Redmi Note 7

Description

Clicked an anchor tag with target="_blank" got called to "shouldOverrideUrlLoading" with "isMainFrame = false" instead of "onCreateWindow"
Expected behavior:

Current behavior:

Steps to reproduce

1. Opens a static page with an anchor tag with target="_blank" and any link in href.
2. Click on the anchor tag.
3. It opens in the current webview

[pichillilorenzo]

If you ever read the API docs, it is clearly written that, on Android, you need to set the option supportMultipleWindows: true:

initialOptions: InAppWebViewGroupOptions(
  crossPlatform: InAppWebViewOptions(
    debuggingEnabled: true,
    useShouldOverrideUrlLoading: true
  ),
  android: AndroidInAppWebViewOptions(
    supportMultipleWindows: true
  )
),

[github-actions]

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