<mat-sidenav-container class="sidenav-container">
<mat-sidenav #drawer class="sidenav" fixedInViewport="true" [attr.role]="(isHandset$| async) ? 'dialog' : 'navigation'"
[mode]="(isHandset$| async) ? 'push' : 'push'" [opened]="!(isHandset$| async)">
<mat-toolbar color="primary">Menu</mat-toolbar>
<mat-nav-list>
<a mat-list-item href="#">Link 1</a>
<a mat-list-item href="#">Link 2</a>
<a mat-list-item href="#">Link 3</a>
</mat-nav-list>
</mat-sidenav>@H_301_8@
我不明白代码中写的是什么(isHandset $| async)请解释一下
解决方法
‘手机’是角度材质布局的断点名称之一.断点名称列表是Handset,Tablet,Web,HandsetPortrait,TabletPortrait,WebPortrait,HandsetLandscape,TabletLandscape,WebLandscape.
有关材料布局断点的更多信息,请查看https://material.io/design/layout/responsive-layout-grid.html#breakpoints
在上面的示例中,isHandset $来自相应的组件.ts文件.请在组件文件中查找与下面类似的代码.
isHandset$: Observable<boolean> = this.breakpointObserver.observe(Breakpoints.Handset)
.pipe(
map(result => result.matches)
);@H_301_8@
当您调整浏览器大小并且浏览器宽度与手机(手机屏幕)匹配时,宽度isHandset $设置为true. ！ (isHandset $| async)依次将sidenav抽屉的“已打开”属性设置为false并折叠sidenav抽屉.
