未捕获错误：模板解析错误： md-sidenav 不是已知元素：1 . 如果 md-sidenav 是Angular组件，则验证它是否为此模块的一部分 . 2.如果 md-sidenav 是Web组件，则将 CUSTOM_ELEMENTS_SCHEMA 添加到此组件的 @NgModule.schemas 以禁止显示此消息 .

("<md-sidenav-container class="example-container">
  [ERROR ->]<md-sidenav #sidenav class="example-sidenav">
    Jolly good!
  </md-sidenav>
"): ng:///SharedModule/SidenavComponent.html@1:2
'md-sidenav-container' is not a known element:
1. If 'md-sidenav-container' is an Angular component, then verify that it is part of this module.
2. If 'md-sidenav-container' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("[ERROR ->]<md-sidenav-container class="example-container">
  <md-sidenav #sidenav class="example-sidenav">
    "): ng:///SharedModule/SidenavComponent.html@0:0
angular angular-material