本文介绍了java fx的webview中的JSexception?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我的java Fx webview抛出了以下代码的JS异常。任何人都可以解释我为什么?
My java Fx webview throws JS exception for following code. Can anyone explain me why?
WebView webview = new WebView();
WebEngine webengine=webview.getEngine();
newtab.setText("Start Page");
newtab.setContent(webview);
editTabset.getTabs().add(newtab);
webengine.load("file:///E:/myproj/src/novuseditor/resources/html/clike.html");/*works till here*/
webengine.executeScript("document.getElementById('code').value=\"Hi\"");
/*exception:netscape.javascript.JSException: TypeError: 'null' is not an object */
推荐答案
webengine.load()
调用是异步的。在应用javascript之前,您需要等到文档加载完毕。例如:
webengine.load()
call is asynchronous. You need to wait until document is loaded before applying javascript. E.g.:
WebView webview = new WebView();
final WebEngine webengine = webview.getEngine();
webengine.getLoadWorker().stateProperty().addListener(
new ChangeListener<State>() {
public void changed(ObservableValue ov, State oldState, State newState) {
if (newState == Worker.State.SUCCEEDED) {
webengine.executeScript("document.getElementById('header').innerHTML = '<p>Hi</p>';");
}
}
});
webengine.load("http://stackoverflow.com");
primaryStage.setScene(new Scene(webview, 400, 400));
WebEngine javadoc有一个例子。
There is an example from the WebEngine javadoc.
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