因为本地希望开启两个项目,由于@angular/cli 生成项目默认是: 4200; 那么肯定会有端口冲突问题;

修改端口的两种方式：

1 修改 schema.json

node_modules\@angular-devkit\build-angular\src\dev-server\schema.json

{
  "title": "Dev Server Target",
  "description": "Dev Server target options for Build Facade.",
  "type": "object",
  "properties": {
    "browserTarget": {
      "type": "string",
      "description": "Target to serve."
    },
    "port": {
      "type": "number",
      "description": "Port to listen on.",
      "default": *4200*
    },
    "host": {
      "type": "string",
      "description": "Host to listen on.",
      "default": "localhost"
    },
    "proxyConfig": {
      "type": "string",
      "description": "Proxy configuration file."
    },
    ...
    ...
  }
}

2 第二种方式通过 --port 方式 package.json中修改

 "start": "ng serve  --port 5200",

推荐用第二种