Interface ApplicationShellLayoutMigration

Readonly layoutVersion

Optional onWillInflateLayout

• onWillInflateLayout(context): MaybePromise<void>

• A migration can transform layout before it will be inflated.

  Parameters

  • context: ApplicationShellLayoutMigrationContext

  Returns MaybePromise<void>

  Throws

  ApplicationShellLayoutMigrationError if a layout cannot be migrated, in this case the default layout will be initialized.

Optional onWillInflateWidget

• onWillInflateWidget(desc, context): MaybePromise<undefined | WidgetDescription>

• A migration can transform the given description before it will be inflated.

  Parameters

  • desc: WidgetDescription
  • context: ApplicationShellLayoutMigrationContext

  Returns MaybePromise<undefined | WidgetDescription>

  a migrated widget description, or undefined

  Throws

  ApplicationShellLayoutMigrationError if a widget description cannot be migrated, in this case the default layout will be initialized.