Other languages such as R and Ruby can be debugged as easily as JavaScript, including stepping through language boundaries during guest language interoperability. This debugging process applies to all guest languages that GraalVM supports. By hovering your cursor over the response variable, for instance, you can inspect its properties, as seen in the screenshot below:Ĭonsult the JavaScript Debugging Reference for details on Chrome DevTools debugging features. Now you can inspect the stack, variables, evaluate variables, and selected expressions in a tooltip, and so on.

Refresh the node.js app and you can see the breakpoint hit.Navigate to the HelloWorld.js file and submit a breakpoint at line 4. Navigate to in your browser to launch the node application. in Chrome open: devtools://devtools/bundled/js_app.html?ws=127.0.0.1:9229/SBqxI5YIqtREaDrXkFr8hLE0HL1AfKx8TjkI8qPMq2s $JAVA_HOME/bin/node -inspect -jvm HelloWorld.jsĭebugger listening on ws://127.0.0.1:9229/SBqxI5YIqtREaDrXkFr8hLE0HL1AfKx8TjkI8qPMq2sĮ.g.

Save this program as HelloWorld.js and then run:.Var server = http.createServer(function (request, response) ) To debug guest language applications, pass the -inspect option to the command line launcher, as in the following example with a Node.js HelloWorld program: var http = require('http') This allows you to attach compatible debuggers such as Chrome Developer Tools to GraalVM. GraalVM supports debugging of guest language applications and provides a built-in implementation of the Chrome DevTools Protocol.

Inspect chrome