runJavaScript method

@override Future<void> runJavaScript(String javaScript)

Runs the given JavaScript in the context of the current page.

The Future completes with an error if a JavaScript error occurred.

Implementation

@override
Future<void> runJavaScript(String javaScript) async {
  final iDocument = _webWebViewParams.iFrame.contentDocument;
  final iBody = iDocument?.body;

  if (iDocument == null || iBody == null) {
    // WebWebViewWidget will call me later.
    _javaScript = javaScript;
  } else {
    /// Reset iScript.
    if (_iScript != null) {
      iBody.removeChild(_iScript!);
    }
    _iScript = iDocument.createElement('script') as web.HTMLScriptElement;
    iBody.appendChild(_iScript!);

    /// Inject JavaScript. Data URL to work around strict CSP.
    _iScript!.src = Uri.dataFromString(
      javaScript,
      mimeType: 'text/javascript',
      encoding: utf8,
    ).toString();
  }
}