angular - Chrome调试器不工作vscode angular 5

Question

我尝试使用 google chrome 调试器，每次按下调试按钮时，我都无法访问本地主机？我究竟做错了什么？

我的launch.json是这样设置的......

{
    "version": "0.2.0",
    "configurations": [
      {
          "type": "chrome",
          "request": "launch",
          "name": "Launch Chrome against localhost",
          "url": "http://localhost:1234",
          "webRoot": "${workspaceFolder}"
      },
      {
          "type": "chrome",
          "request": "attach",
          "name": "Attach to Chrome",
          "port": 9222,
            "webRoot": "${workspaceFolder}"
      }
      ]
    }

任何帮助将不胜感激，如果需要更多信息，请告诉我..