@yakczh IE9

@stx0821 ng2到ng4 升级不需要学习成本

@imhered

"dependencies": {
    "@angular/common": "4.0.0",
    "@angular/compiler": "4.0.0",
    "@angular/core": "4.0.0",
    "@angular/forms": "4.0.0",
    "@angular/http": "4.0.0",
    "@angular/platform-browser": "4.0.0",
    "@angular/platform-browser-dynamic": "4.0.0",
    "@angular/router": "4.0.0",
    "core-js": "^2.4.1",
    "express": "^4.15.2",
    "jquery": "^3.2.1",
    "moment": "^2.18.1",
    "reflect-metadata": "^0.1.3",
    "rxjs": "^5.0.1",
    "socket.io": "^1.7.3",
    "zone.js": "^0.8.5"
  },