使用(click)=“onSelect(hero),我可以绑定到li标签的click事件.
我也可以绑定到li标签的mouSEOver事件.
但是我无法绑定到li标签的keydown事件.
li标签支持click,mouSEOver,keydown propety,所以我想我可以使用keydown事件(向下箭头)导航到此列表框中的下一个项目.
我也可以绑定到li标签的mouSEOver事件.
但是我无法绑定到li标签的keydown事件.
li标签支持click,mouSEOver,keydown propety,所以我想我可以使用keydown事件(向下箭头)导航到此列表框中的下一个项目.
我可以找到哪些官方文档？
<div class = "body-container">
<ul class = "heroes">
<li *ngFor = "let hero of heroes" (click)="onSelect(hero)" (keydown)="onKeydown()" (mouSEOver)="onKeydown()" class="bl-list-item" [class.bl-list-item-checked]="hero === selectedHero">
<div class="guide-label">
<span style="width:50px" [class.fa-check]="hero === selectedHero" [class.li-fa-check]="hero === selectedHero"></span>
<div class="guide-code-column">{{hero.id}}</div>
<div class="guide-name-column">{{hero.name}}</div>
</div>
</li>
</ul>
</div>
export class SearchComponent {
heroes: Hero[] = [];
selectedHero: Hero;
constructor(private heroService: HeroService) { }
ngOnInit(): void {
this.heroService.getHeroes()
.then(heroes => this.heroes = heroes);
}
showDialog = false;
onSelect(hero: Hero): void {
this.selectedHero = hero;
}
onKeydown(): void {
console.log("onKeydown");
}
}
解决方法
您基本上从事件类型开始,然后添加一系列点分隔修饰符.例如：
First,the limitations. The native KeyEventsPlugin plugin only support
keydown and keyup events,not keypress. And,these key combinations
can only be bound to a specific element (or host) – the plugin doesn’t
appear to support the global “document:” or “window:” event-scope.
There is also no implicit support for browser-overrides. Meaning,if
you need to cancel the default-behavior of the key-combination,you
have to do it yourself (with $event.preventDefault()).
keydown.a keydown.b keydown.c keydown.dot keydown.Spacebar keydown.Meta.Enter keydown.alt.Enter keydown.control.Enter keydown.shift.Enter keydown.Meta.o keydown.Meta.s keydown.Meta.f keydown.escape
“特殊键”修饰符是：
ALT
控制
Meta – Mac上的Command键和Windows上的Windows键.
转移
然后有两个替换键,只是保持语法不破：
空间 – 或者,您可以使用“空格键”.
点 – 由于修饰符以点分隔.
<input
(keydown.Enter)="handleKeyEvent( $event,'Enter' )"
(keydown.alt.Enter)="handleKeyEvent( $event,'ALT + Enter' )" (keydown.control.Enter)="handleKeyEvent( $event,'Control + Enter' )"
(keydown.Meta.Enter)="handleKeyEvent( $event,'Meta + Enter' )"
(keydown.shift.Enter)="handleKeyEvent( $event,'Shift + Enter' )"
(keydown.Escape)="handleKeyEvent( $event,'Escape' )"
(keydown.ArrowLeft)="handleKeyEvent( $event,'Arrow Left' )"
(keydown.ArrowUp)="handleKeyEvent( $event,'Arrow Up' )"
(keydown.ArrowRight)="handleKeyEvent( $event,'Arrow Right' )"
(keydown.ArrowDown)="handleKeyEvent( $event,'Arrow Down' )"
autofocus>
