本文介绍了On Key `Enter` 触发活动列表项 Angular 上的点击事件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我制作了一个包含资源的水平滚动条.我正在使用箭头键在列表中导航,现在我想通过单击 Enter 来打开该特定突出显示列表.
组件.ts
arrowkeyLocation = 0;@HostListener('document:keydown', ['$event'])keyDown(事件:KeyboardEvent,资源):无效{if (event.keyCode === 37 && this.arrowkeyLocation > 0) {this.arrowkeyLocation--;}if (event.keyCode === 39 && this.arrowkeyLocation < this.searchData.toArray().length - 1 ) {this.arrowkeyLocation++;}if (event.keyCode === 13) {//在这里做你的代码**控制台日志(项目);}}
HTML
<div #myVar [appSearchfocus]="i === arrowkeyLocation" *ngFor="let resource of all_resources | searchResource: message; let i=index" [ngClass]="{'active':arrowkeyLocation === i }"(keydown)="keyDown($event, resource)" ><a target="_blank" href={{resource.url}} class="noDecoration"><div ><p><b>{{resource.title}}</b></p>
</a>
指令.ts
@Directive({选择器:'[appSearchfocus]'})导出类 SearchfocusDirective {@输入()设置 appSearchfocus(值:布尔值){如果(值){this.renderer.invokeElementMethod(this.elementRef.nativeElement, 'scrollIntoViewIfNeeded');}}构造函数(私有元素引用:元素引用,私有渲染器:渲染器){}}
现在,我想在列表中导航时触发点击,如果我点击 enter
键,那么我想打开该资源.
解决方案
我得到了结果:
if (event.keyCode === 13) {this.searchData.forEach(元素 => {if (element.nativeElement.classList.contains('active') ) {让我们检查一下: HTMLElement = element.nativeElement.getElementsByTagName("a").item(0);check.click();}});}}
I made a horizontal scroll with resources in it.I'm using the arrow key to navigate in the list, now I want to open that particular highlight list by clicking enter.
Component.ts
arrowkeyLocation = 0;
@HostListener('document:keydown', ['$event'])
keyDown(event: KeyboardEvent, resource): void {
if (event.keyCode === 37 && this.arrowkeyLocation > 0) {
this.arrowkeyLocation--;
}
if (event.keyCode === 39 && this.arrowkeyLocation < this.searchData.toArray().length - 1 ) {
this.arrowkeyLocation++;
}
if (event.keyCode === 13) {
// do your code here**
console.log(item);
}
}
HTML
<div #myVar [appSearchfocus]="i === arrowkeyLocation" *ngFor="let resource of all_resources | searchResource: message; let i=index" [ngClass]="{'active': arrowkeyLocation === i }"(keydown)="keyDown($event, resource)" >
<a target="_blank" href={{resource.url}} class="noDecoration">
<div >
<p><b>{{ resource.title }}</b></p>
</div>
</a>
</div>
directive.ts
@Directive({
selector: '[appSearchfocus]'
})
export class SearchfocusDirective {
@Input()
set appSearchfocus(value: boolean){
if(value){
this.renderer.invokeElementMethod(this.elementRef.nativeElement, 'scrollIntoViewIfNeeded');
}
}
constructor(private elementRef: ElementRef, private renderer: Renderer) {
}
}
Now, what I want to trigger click while navigating on the list and if I hit enter
key then I want to open that resource.
解决方案
I got the result using:
if (event.keyCode === 13) {
this.searchData.forEach(element => {
if (element.nativeElement.classList.contains('active') ) {
let check: HTMLElement = element.nativeElement.getElementsByTagName("a").item(0);
check.click();
}
});
}
}
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