launch.json

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
          "type": "office-addin",
          "request": "attach",
          "name": "Attach to Addin With SourceMaps",
          "port": 9222,
          "trace":"verbose",
          "url": "https://localhost:3000/taskpane.html?_host_Info=Excel$Win32$16.01$en-US$$$$0",
          "webRoot": "${workspaceFolder}",
          "sourceMaps": true,
          "sourceMapPathOverrides": {
            "webpack:///./src/*": "${workspaceFolder}/src/*",
            "webpack:///./node_modules/*": "${workspaceFolder}/node_modules/*",
          },
          "showAsyncStacks": true,
          "skipFiles": [
            "polyfill.js",
            "excel-win32-16.01.js"
          ]
        },
	{
          "type": "office-addin",
          "request": "launch",
          "name": "Attach to Addin No SourceMaps",
          "port": 9222,
          "trace":"verbose",
          "url": "https://localhost:3000/taskpane.html?_host_Info=Excel$Win32$16.01$en-US$$$$0",
          "webRoot": "${workspaceFolder}",
          "sourceMaps": true,
          "showAsyncStacks": true,
          "skipFiles": [
            "polyfill.js",
            "excel-win32-16.01.js"
          ]
        }
    ]
}