Debug Safari and WebViews on iOS from tools like VS Code
...Install VS Code, and the VS Code Chrome Debugger, then create a launch.json configuration where port is set to 9000. The protocol adapter is implemented in TypeScript as Node-based CLI tool which starts an instance of ios-webkit-debug-proxy, detects the connected iOS devices, and then starts up an instance of the correct protocol adapter depending on the iOS version.
Debug your JavaScript code running in Google Chrome from VS Code
...Both modes require you to be serving your web application from a local web server, which is started from either a VS Code task or from your command line. Using the URL parameter you simply tell VS Code which URL to either open or launch in Chrome. Just like when using the Node debugger, you configure these modes with a .vscode/launch.json file in the root directory of your project. You can create this file manually, or Code will create one for you if you try to run your project, and it doesn't exist yet.