launch.json

{
	"version": "0.1.0",
	// List of configurations. Add new configurations or edit existing ones.
	// ONLY "node" and "mono" are supported, change "type" to switch.
	"configurations": [
		{
			// Name of configuration; appears in the launch configuration drop down menu.
			"name": "Debug gulpfile.js",
			// Type of configuration. Possible values: "node", "mono".
			"type": "node",
			// Workspace relative or absolute path to the program.
			"program": "gulpfile.js",
			// Automatically stop program after launch.
			"stopOnEntry": false,
			// Command line arguments passed to the program.
			"args": ["build"],
			// Workspace relative or absolute path to the working directory of the program being debugged. Default is the current workspace.
			"cwd": ".",
			// Workspace relative or absolute path to the runtime executable to be used. Default is the runtime executable on the PATH.
			"runtimeExecutable": null,
			// Optional arguments passed to the runtime executable.
			"runtimeArgs": ["--nolazy"],
			// Environment variables passed to the program.
			"env": { },
			// Use JavaScript source maps (if they exist).
			"sourceMaps": false,
			// If JavaScript source maps are enabled, the generated code is expected in this directory.
			"outDir": null
		},
		{
			"name": "Attach",
			"type": "node",
			// TCP/IP address. Default is "localhost".
			"address": "localhost",
			// Port to attach to.
			"port": 5858,
			"sourceMaps": false
		}
	]
}