Compound debug configurations

Often you need to run multiple processes at once, but debug them as if they were the same project. A common scenario for this is running a React, Angular or Vue app, along with some sort of API service using Express or Hapi. VS Code has a feature called "Compound Launch Configurations" that allow you to launch multiple debug processes at one.
Exercise
Answer
  • Open "4-compound-launch-config"
  • Start the frontend application
  • Create two launch configs..
    • One for the Node process that runs in the "/server" folder
    • One of the Chrome process that runs from the root
  • Create a compound launch config that includes both of the above configs
  • Run the compound launch config
  • Add a breakpoint to "src/App.js"
  • Add a breakpoint to "server/routes/index.js"
  • Hit both the breakpoints
  • Open a new integrated terminal instance (Cmd/Ctrl + `)
  • Make sure that you are in the "4-compound-launch-config" folder
  • Run the frontend application with npm start
  • Open the Debug Explorer (Cmd/Ctrl + Shift + D)
  • Open the dropdown list and select "Add Config (4-compound-launch-config)
  • Select "Chrome" from the prompt
  • Modify the launch config so that it looks like this...
{
// 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": "chrome",
"request": "launch",
"name": "Launch Chrome",
"url": "http://localhost:3000",
"webRoot": "${workspaceFolder}/src"
}
]
}
  • Click the "Add Configuration" button
  • Select "Node.js Launch Program" from the list
  • Change the "program" value in the "Launch Program" config to be "${workspaceFolder}/server/server.js"
"type": "node",
"request": "launch",
"name": "Launch Program",
"program": "${workspaceFolder}/server/server.js"
},
  • Right above the "configurations" attribute, add a "compound" attribute. Start typing and then select "compound" from the auto-complete.
  • Name it "Launch Project 4"
  • Set the "configurations" attribute to...
"compounds": [
{
"name": "Launch Project 4",
"configurations": ["Launch Program", "Launch Chrome"]
}
]
  • Select "Launch Project 4" from the dropdown list in the Debug Explorer
  • Press the green button next to the dropdown list
  • VS Code will launch a new instance of Chrome and start the Express server project.
  • Add a breakpoint to line 12 in the "server/routes/index.js" file
  • Add a breakpoint to line 39 in the "src/App.js" file
  • Change the color in the app and press the button
  • Hit the breakpoints