我正在使用一个带有Angular Bootstrap的模板。当我用鼠标悬停在下拉事件上而不是单击它时,我正试图调用它。如何调用此事件?
<div ngbDropdown class="d-inline-block dropdown">
<a class="navbar-brand" id="dropdownBasic1" href="#basiccomponents" ngbDropdownToggle>Learning</a>
<div ngbDropdownMenu aria-labelledby="dropdownBasic1" class="dropdown-primary">
<a class="dropdown-item">Learning Outcomes</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item">Learning Plan</a>
</div>
</div>
下拉式API有一个toggle()
方法,以及显式open()
和close()
。通过绑定到(mouseenter)
和(mouseleave)
事件,在悬停时调用它们。
以下是一些基础知识,但并不是一个完整的例子。您需要提供下拉列表的参考。
<div ngbDropdown class="d-inline-block dropdown" (mouseenter)="onHover($event)" (mouseleave)="onHover($event)">
...
<div>
onHover(event): void {
this.myDropDown.toggle();
}
在html模板中为ngbDrop创建一个变量(无论名称如何(:#drop
指定typescript类型ngbDrop#drop="ngbDropdown"
在ngbDropdown上的事件鼠标悬停时调用方法:
<li ngbDropdown #drop="ngbDropdown" (mouseover)='over(drop)'>
在ngbDropdownMenu上的事件mouseout调用方法:
<div ngbDropdownMenu (mouseout)='out(drop)'>
over(drop:NgbDropdown){
drop.open()
}
out(drop:NgbDropdown){
drop.close()
}
<li class="nav-item" ngbDropdown #drop="ngbDropdown" display="dynamic" placement="bottom-end" (mouseover)='over(drop)' (mouseout)='out(drop)'>
<a class="nav-link" tabindex="0" ngbDropdownToggle id="navbarDropdown3" role="button">
Dynamic
</a>
<div ngbDropdownMenu aria-labelledby="navbarDropdown3" class="dropdown-menu">
<a ngbDropdownItem href="#" (click)="$event.preventDefault()">Action</a>
<a ngbDropdownItem href="#" (click)="$event.preventDefault()">Another action</a>
<a ngbDropdownItem href="#" (click)="$event.preventDefault()">Something else here</a>
</div>
</li>
尝试将有角度的材质与mouseleave和mouseenter evenets一起使用。
参考:https://www.thetopsites.net/article/54301126.shtml#:~:text=到%20隐藏%20菜单%2C%20添加%20鼠标离开%20事件%20到%20菜单&text=演示%20%3E%20Menu%2C%20Now%20单击%20,库%20到%20构造%20UI%2FUX。演示:https://stackblitz.com/edit/example-angular-material-toolbar-menu-wrut3v