zoomBy method

Future<void> zoomBy({ required double zoomFactor, @Deprecated('Use `animated` instead') bool? iosAnimated, bool animated = false, })

Performs a zoom operation in this WebView.

zoomFactor represents the zoom factor to apply. On Android, the zoom factor will be clamped to the Webview's zoom limits and, also, this value must be in the range 0.01 (excluded) to 100.0 (included).

animated true to animate the transition to the new scale, false to make the transition immediate. NOTE: available only on iOS.

NOTE: available on Android 21+.

Supported Platforms/Implementations:

• Android native WebView (Official API - WebView.zoomBy)
• iOS (Official API - UIScrollView.setZoomScale)

Implementation

Future<void> zoomBy(
    {required double zoomFactor,
    @Deprecated('Use `animated` instead') bool? iosAnimated,
    bool animated = false}) async {
  assert(defaultTargetPlatform != TargetPlatform.android ||
      (defaultTargetPlatform == TargetPlatform.android &&
          zoomFactor > 0.01 &&
          zoomFactor <= 100.0));

  Map<String, dynamic> args = <String, dynamic>{};
  args.putIfAbsent('zoomFactor', () => zoomFactor);
  args.putIfAbsent('animated', () => iosAnimated ?? animated);
  return await _channel.invokeMethod('zoomBy', args);
}