Debug with Chromium

In vscode go to the debug panel and click on the cog in the top right.

Change the content of launch.json to

    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit:
    "version": "0.2.0",
    "configurations": [
            "type": "chrome",
            "request": "launch",
            "name": "Launch Chromium",
            "url": "http://localhost:4200",
            "runtimeExecutable": "/usr/bin/chromium",
            "webRoot": "${workspaceFolder}",
            "sourceMaps": true,
            // this enables chromium to be launched even if it is alredy open
            "userDataDir": "${workspaceRoot}/.vscode/chrome",

Be sure to have installed the extension Debugger for Chrome.