Visual Studio Code offers a few ways for debugging your code.

• You can set breakpoints on lines of code where you want execution to pause.
• While paused, you can inspect variables, call stacks, and evaluate expressions to see what’s going on.
• You can step through code line by line (Step Over, Step Into functions, Step Out) to follow the logic flow.
• You can even change variables on the fly to test different scenarios.

There are a bunch of templates that Visual Studio Code provides to get up and running quickly.

Together

We’re going to walk through the maths example in [this repository].

Exercise: Debugging an Express Application

Set up a launch.json. Here is a example of a super simple launch.json.

{
  "version": "0.2.0",
  "configurations": [
    {
      "type": "node",
      "request": "launch",
      "name": "Launch Program",
      "skipFiles": ["<node_internals>/**"],
      "args": ["${workspaceFolder}/index.js"]
    }
  ]
}