Creating a launch.json file

VSCode includes an integrated debugger that can be used to debug TypeScript projects. If we switch to the Debugger panel, or simply hit F5 to start debugging, VSCode will ask us to select a debugging environment. For the time being, select the Node.js option, which will create a launch.json file in the .vscode directory, and again open it for editing. Find the option named program, and modify it to read "${workspaceFolder}/hello.js". Hit F5 again, and VSCode will launch hello.js as a Node program and output the results to the debugging window:

node --debug-brk=34146 --nolazy hello.js 
debugger listening on port 34146
hello vscode