MathML tags don't render properly in JavaFX WebView

Question

MathML tags don't render properly in JavaFX WebView

JDK Version : 1.8.0_192

For example,

<math xmlns="http://www.w3.org/1998/Math/MathML"> 
   <msub> 
    <mi>
      S 
    </mi> 
    <mi>
      n 
    </mi> 
   </msub> 
   <mo>
     &lt; 
   </mo> 
   <mstyle displaystyle="true" scriptlevel="0"> 
    <mfrac> 
     <mi>
       π 
     </mi> 
     <mrow> 
      <mn>
        3 
      </mn>     
      <msqrt> 
       <mn>
         3 
       </mn> 
      </msqrt> 
     </mrow> 
    </mfrac> 
   </mstyle> 
 </math>

The above code renders as:

in Google Chrome, while it renders as:

in JavaFX WebView.

How to fix this issue?

Answer 1

The result on my computer with the code you posted ? ?

First, be sure you're using at least Java/JavaFX 8 192 build 04 or JavaFX 11 (MathML support is broken, in Java/JavaFX 9 and 10 and won't be fixed in these versions).

Secondly, verify your font list. May be a font config issue on your computer ?

At least one of these fonts must be installed (in order of preference):

• Latin Modern Math

• STIX Two Math

• XITS Math
• STIX Math
• Libertinus Math

• TeX Gyre Termes Math

• TeX Gyre Bonum Math

• TeX Gyre Schola

• DejaVu Math TeX Gyre

• TeX Gyre Pagella Math

• Asana Math

• Cambria Math

• Lucida Bright Math

• Minion Math

• Times New Roman

The result on my computer too, but after Latin Modern Math font installation :

Code example : did you use a code like this ?

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.scene.web.WebView;
import javafx.stage.Stage;

public class NavigateurTest extends Application {

    final StackPane root = new StackPane();
    final WebView webView =  new WebView();
    String ContentStackOverFlow = ""
            + "<math xmlns=\"http://www.w3.org/1998/Math/MathML\">"
            + "   <msub>"
            + "      <mi>S</mi>"
            + "      <mi>n</mi>"
            + "   </msub>"
            + "   <mo>&lt;</mo>"
            + "   <mstyle displaystyle=\"true\" scriptlevel=\"0\">"
            + "      <mfrac>"
            + "         <mi>π</mi>"
            + "         <mrow>"
            + "            <mn>3</mn>"
            + "            <msqrt>"
            + "               <mn>3</mn>"
            + "            </msqrt>"
            + "         </mrow>"
            + "      </mfrac>"
            + "   </mstyle>"
            + "</math>";

    public void init() {    
        root.getChildren().add(webView);
    }

    @Override
    public void start(Stage primaryStage) {

        //webView.getEngine().load("https://www.qwant.com");
        webView.getEngine().loadContent(ContentStackOverFlow);

        primaryStage.setTitle("OpenJFX MathML Rendering WebBrowser Test");
        primaryStage.setScene(new Scene(root));
        primaryStage.show();

    }

}