sp-dev-fx-webparts/samples/react-search/.vscode/launch.json

{
  "version": "0.2.0",
  "configurations": [
    {
        "name": "Launch localhost with sourcemaps",
        "type": "chrome",
        "request": "launch",
        "url": "http://localhost:4321/temp/workbench.html",
        "webRoot": "${workspaceRoot}/src",
        "sourceMaps": true
    }
  ]
}