hasJavaScriptHandler method

bool hasJavaScriptHandler({
  1. required String handlerName,
})

Returns true if a JavaScript handler with handlerName already exists, otherwise false.

Officially Supported Platforms/Implementations:

  • Android WebView
  • iOS WKWebView
  • macOS WKWebView
  • Web <iframe> but requires same origin
  • Windows WebView2

Parameters - Officially Supported Platforms/Implementations:

  • handlerName: all platforms

Use the PlatformInAppWebViewController.isMethodSupported method to check if this method is supported at runtime.

Implementation

bool hasJavaScriptHandler({required String handlerName}) =>
    platform.hasJavaScriptHandler(handlerName: handlerName);