How to debug line by line in REACT using VS code editor?

This is my working Launch script. This enabled debugging my code line by line with breakpoints. Also, this is with Edge chromium-browser. (Latest VS code editor)

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Launch localhost in Microsoft Edge",
            "type": "edge",
            "request": "launch",
            "url": "http://localhost:3000/api",
            "webRoot": "${workspaceFolder}/ABC-MVP/backend/src",
            "sourceMapPathOverrides": {
                "webpack:///*": "*",
                "webpack:///./*": "${webRoot}/*",
                "webpack:///src/*": "${webRoot}/*",
                "webpack:///./~/*": "${webRoot}/node_modules/*"
            }
        },
        {
            "name": "Launch index.html in Microsoft Edge",
            "type": "edge",
            "request": "launch",
            "port": 3000,
            "file": "${workspaceFolder}/index.html"
        },
        {
            "type": "node",
            "name": "Debug CRA Tests",
            "request": "launch",
            "args": [
              "app.ts",
              "--runInBand",
              "--no-cache",
              "--env=jsdom"
            ],
            "cwd": "${workspaceFolder}",
            "console": "internalConsole",
            //"console": "integratedTerminal",
            "internalConsoleOptions": "openOnSessionStart",
            "disableOptimisticBPs": true,
            "runtimeExecutable":
              "${workspaceFolder}/ABC-MVP/backend/node_modules/.bin/react-scripts",
              //"${workspaceFolder}/ABC-MVP/backend/src/models",
              "protocol": "inspector"
          }
    ]
} 

I think your Launch.json is OKay. The only thing that differs from ASP.Net is that, your first have to start your app with npm start or yarn start and then hit Debugger to launch the debugger. circle's show that your App is not currently running that's why they won't be hit. And Yes the most IMP thing is, your current code is not React Front-end. It's NodeJS Backend, so follow this guide to debug that code.