如何在Node.js中使用调试器语句？

Question

我有一个Node.js项目，我想知道如何使用'debugger;'。语句以暂停执行并检查堆栈跟踪以及Chrome中的变量状态。

这在我的其他其他使用React JS，Node和Express的项目中起作用。

当前的问题是调试器语句将被忽略，应用程序将继续运行而不停止。是否应该安装配置或库才能启用该功能？

package.json

{
  "scripts": {
    "ng": "ng",
    "start": "node --inspect ./bin/www",
    "debug-app": "node --inspect --debug-brk ./bin/www",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "~7.1.0",
    "@angular/common": "~7.1.0",
    "@angular/compiler": "~7.1.0",
    "@angular/core": "~7.1.0",
    "@angular/forms": "~7.1.0",
    "@angular/platform-browser": "~7.1.0",
    "@angular/platform-browser-dynamic": "~7.1.0",
    "@angular/router": "~7.1.0",
    "bluebird": "^3.5.3",
    "body-parser": "^1.18.3",
    "bull": "^3.6.0",
    "core-js": "^2.5.4",
    "ejs": "^2.6.1",
    "express": "^4.16.4",
    "ioredis": "^4.5.1",
    "mongo-express": "^0.51.1",
    "mongoose": "^5.4.3",
    "morgan": "^1.9.1",
    "node-cron": "^2.0.3",
    "node-fetch": "^2.3.0",
    "rxjs": "~6.3.3",
    "serve-favicon": "^2.5.0",
    "swagger-ui-express": "^4.0.2",
    "tslib": "^1.9.0",
    "zone.js": "~0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "^0.12.1",
    "@angular/cli": "~7.1.4",
    "@angular/compiler-cli": "~7.1.0",
    "@angular/language-service": "~7.1.0",
    "@babel/polyfill": "^7.2.5",
    "@types/bull": "^3.5.5",
    "@types/jasmine": "~2.8.8",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "~8.9.4",
    "babel-preset-env": "^1.7.0",
    "babel-register": "^6.26.0",
    "codelyzer": "~4.5.0",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~3.1.1",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.1",
    "karma-jasmine": "~1.1.2",
    "karma-jasmine-html-reporter": "^0.2.2",
    "nodemon": "^1.18.9",
    "protractor": "~5.4.0",
    "ts-node": "~7.0.0",
    "tslint": "~5.11.0",
    "typescript": "~3.1.6"
  }
}

bin / www

#!/usr/bin/env node

/**
 * Module dependencies.
 */
require('babel-register')({
  presets: ['env']
});
require("@babel/polyfill");

var app = require('../app');
var debug = require('debug')('mean-app:server');
var http = require('http');

/**
 * Get port from environment and store in Express.
 */

var port = normalizePort(process.env.PORT || '3000');
app.set('port', port);

/**
 * Create HTTP server.
 */

var server = http.createServer(app);

/**
 * Listen on provided port, on all network interfaces.
 */

server.listen(port);
server.on('error', onError);
server.on('listening', onListening);

/**
 * Normalize a port into a number, string, or false.
 */

function normalizePort(val)
{
  var port = parseInt(val, 10);

  if (isNaN(port))
  {
    // named pipe
    return val;
  }

  if (port >= 0)
  {
    // port number
    return port;
  }

  return false;
}

/**
 * Event listener for HTTP server "error" event.
 */

function onError(error)
{
  if (error.syscall !== 'listen')
  {
    throw error;
  }

  var bind = typeof port === 'string'
    ? 'Pipe ' + port
    : 'Port ' + port;

  // handle specific listen errors with friendly messages
  switch (error.code)
  {
    case 'EACCES':
      console.error(bind + ' requires elevated privileges');
      process.exit(1);
      break;
    case 'EADDRINUSE':
      console.error(bind + ' is already in use');
      process.exit(1);
      break;
    default:
      throw error;
  }
}

/**
 * Event listener for HTTP server "listening" event.
 */

function onListening()
{
  var addr = server.address();
  var bind = typeof addr === 'string'
    ? 'pipe ' + addr
    : 'port ' + addr.port;
  debug('Listening on ' + bind);
}