在新的Angular2框架中,有人知道如何像事件一样执行悬停吗?
在Angular1中有ng-Mouseover,但这似乎没有被延续。
我看了所有的文件,什么都没发现。
在新的Angular2框架中,有人知道如何像事件一样执行悬停吗?
在Angular1中有ng-Mouseover,但这似乎没有被延续。
我看了所有的文件,什么都没发现。
当前回答
如果你对鼠标进出某个组件感兴趣,你可以使用@HostListener装饰器:
import { Component, HostListener, OnInit } from '@angular/core';
@Component({
selector: 'my-component',
templateUrl: './my-component.html',
styleUrls: ['./my-component.scss']
})
export class MyComponent implements OnInit {
@HostListener('mouseenter')
onMouseEnter() {
this.highlight('yellow');
}
@HostListener('mouseleave')
onMouseLeave() {
this.highlight(null);
}
...
}
正如@Brandon评论OP (https://angular.io/docs/ts/latest/guide/attribute-directives.html)中的链接所解释的那样
其他回答
你可以用一个主机:
import { Directive, ElementRef, Input } from '@angular/core';
@Directive({
selector: '[myHighlight]',
host: {
'(mouseenter)': 'onMouseEnter()',
'(mouseleave)': 'onMouseLeave()'
}
})
export class HighlightDirective {
private _defaultColor = 'blue';
private el: HTMLElement;
constructor(el: ElementRef) { this.el = el.nativeElement; }
@Input('myHighlight') highlightColor: string;
onMouseEnter() { this.highlight(this.highlightColor || this._defaultColor); }
onMouseLeave() { this.highlight(null); }
private highlight(color:string) {
this.el.style.backgroundColor = color;
}
}
只需调整它到你的代码(在:https://angular.io/docs/ts/latest/guide/attribute-directives.html)
如果你对鼠标进出某个组件感兴趣,你可以使用@HostListener装饰器:
import { Component, HostListener, OnInit } from '@angular/core';
@Component({
selector: 'my-component',
templateUrl: './my-component.html',
styleUrls: ['./my-component.scss']
})
export class MyComponent implements OnInit {
@HostListener('mouseenter')
onMouseEnter() {
this.highlight('yellow');
}
@HostListener('mouseleave')
onMouseLeave() {
this.highlight(null);
}
...
}
正如@Brandon评论OP (https://angular.io/docs/ts/latest/guide/attribute-directives.html)中的链接所解释的那样
在你的js/ts文件的html将被盘旋
@Output() elemHovered: EventEmitter<any> = new EventEmitter<any>();
onHoverEnter(): void {
this.elemHovered.emit([`The button was entered!`,this.event]);
}
onHoverLeave(): void {
this.elemHovered.emit([`The button was left!`,this.event])
}
在你的HTML中
(mouseenter) = "onHoverEnter()" (mouseleave)="onHoverLeave()"
在你的js/ts文件中,将接收到悬停的信息
elemHoveredCatch(d): void {
console.log(d)
}
在与捕获js/ts文件连接的HTML元素中
(elemHovered) = "elemHoveredCatch($event)"
在Angular2+中简单地做(mouseenter)属性…
在你的HTML中:
<div (mouseenter)="mouseHover($event)">Hover!</div>
在你的组件中:
import { Component, OnInit } from '@angular/core';
@Component({
selector: 'component',
templateUrl: './component.html',
styleUrls: ['./component.scss']
})
export class MyComponent implements OnInit {
mouseHover(e) {
console.log('hovered', e);
}
}
@Component({
selector: 'drag-drop',
template: `
<h1>Drag 'n Drop</h1>
<div #container
class="container"
(mousemove)="onMouseMove( container)">
<div #draggable
class="draggable"
(mousedown)="onMouseButton( container)"
(mouseup)="onMouseButton( container)">
</div>
</div>`,
})
http://lishman.io/angular-2-event-binding