JavaFx WebEngine - Overwriting a website's stylesheet with (local) files

Question

I\'d like to customise the appearance of a website that I am loading, so I created a little test.css file that does nothing but changing the look of all table r

Answer 1

setUserStyleSheetLocation()was designed for that very purpose: to let the user of the web page, style it as they want.

Usage:

webEngine.setUserStyleSheetLocation(styleSheetURL.toString());

Answer 2

First of I have to state, that I hope you know what you are doing, as these things can seriously damage a web site. So here is what you can do:

You grab the Document from the WebEngine, retrieve the head element and add a style child element to it, containing the src location of the stylesheet you want to add.

Document doc = webView.getEngine().getDocument();
URL scriptUrl = getClass().getResource(pathToAttachedDocument); // pathToAttachedDocument = CSS file you want to attach
String content = IOUtils.toString(scriptUrl); // Use Apache IO commons for conveniance
Element appendContent = doc.createElement("style");
appendContent.appendChild(doc.createTextNode(content));
doc.getElementsByTagName("head").item(0).appendChild(appendContent);

By the way, JavaScript can be added in a similar way, it's just 'script' instead of 'style'

Answer 3

I would do like this to ADD or REPLACE any rules :

String css  = getFileAsString("style.css");
Document doc = webEngine.getDocument();
Element e = doc.getElementById("my_style");
e.setTextContent(css);

... given a

<style id="my_style"></style> 

tag in the HTML document.