小开

是的，angar2中有on-mouseover，而不是像angular 1中的ng-Mouseover。所以你必须这样写:-

<div on-mouseover='over()' style="height:100px; width:100px; background:#e2e2e2">hello mouseover</div>


over(){
console.log("Mouseover called");
}

正如@Gunter在评论中建议的那样，我们也可以使用on-mouseover。有些人更喜欢带前缀的替代形式，称为规范形式。

更新

HTML代码-

<div (mouseover)='over()' (mouseout)='out()' style="height:100px; width:100px; background:#e2e2e2">hello mouseover</div>

控制器/。TS代码-

import { Component } from '@angular/core';


@Component({
selector: 'my-app',
templateUrl: './app.component.html',
styleUrls: [ './app.component.css' ]
})
export class AppComponent  {
name = 'Angular';


over(){
console.log("Mouseover called");
}


out(){
console.log("Mouseout called");
}
}

工作示例

其他一些鼠标事件也可以在Angular中使用

(mouseenter)="myMethod()"
(mousedown)="myMethod()"
(mouseup)="myMethod()"

小开

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;
}


}

只是调整它到你的代码(找到:https://angular.io/docs/ts/latest/guide/attribute-directives.html)

小开

最佳答案

如果您想在任何HTML元素上执行类似悬停的事件，那么您可以这样做。

超文本标记语言

 <div (mouseenter) ="mouseEnter('div a') "  (mouseleave) ="mouseLeave('div A')">
<h2>Div A</h2>
</div>
<div (mouseenter) ="mouseEnter('div b')"  (mouseleave) ="mouseLeave('div B')">
<h2>Div B</h2>
</div>

组件

import { Component } from '@angular/core';


@Component({
moduleId: module.id,
selector: 'basic-detail',
templateUrl: 'basic.component.html',
})
export class BasicComponent{


mouseEnter(div : string){
console.log("mouse enter : " + div);
}


mouseLeave(div : string){
console.log('mouse leave :' + div);
}
}

为了在angular 2中完全实现功能性悬停事件，你应该同时使用mouseenter和mouseleave事件。

小开

对于处理overing事件，您可以尝试这样做 (它适用于我):

在Html模板中:

<div (mouseenter)="onHovering($event)" (mouseleave)="onUnovering($event)">
<img src="../../../contents/ctm-icons/alarm.svg" class="centering-me" alt="Alerts" />
</div>

在角分量中:

    onHovering(eventObject) {
console.log("AlertsBtnComponent.onHovering:");
var regExp = new RegExp(".svg" + "$");


var srcObj = eventObject.target.offsetParent.children["0"];
if (srcObj.tagName == "IMG") {
srcObj.setAttribute("src", srcObj.getAttribute("src").replace(regExp, "_h.svg"));
}


}
onUnovering(eventObject) {
console.log("AlertsBtnComponent.onUnovering:");
var regExp = new RegExp("_h.svg" + "$");


var srcObj = eventObject.target.offsetParent.children["0"];
if (srcObj.tagName == "IMG") {
srcObj.setAttribute("src", srcObj.getAttribute("src").replace(regExp, ".svg"));
}
}

小开

@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>`,


})

< a href = " http://lishman。Io /angular-2-event-binding" rel="nofollow noreferrer">http://lishman.io/angular-2-event-binding

小开

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)"

小开

如果你对鼠标进入或离开某个组件感兴趣，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);
}


...


}

正如在@Brandon评论OP (https://angular.io/docs/ts/latest/guide/attribute-directives.html)中的链接中所解释的那样

小开

简单地在Angular2+中执行(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);
}
}

小开

如果鼠标在整个组件上是你的选项，你可以直接是@hostListener来处理事件来执行鼠标在下面的al。

  import {HostListener} from '@angular/core';


@HostListener('mouseenter') onMouseEnter() {
this.hover = true;
this.elementRef.nativeElement.addClass = 'edit';
}


@HostListener('mouseleave') onMouseLeave() {
this.hover = false;
this.elementRef.nativeElement.addClass = 'un-edit';
}

它在@angular/core中可用。我在angular 4.x.x中测试了它

小开

如果你只是寻找一个悬停效果，使用Hover.css。

npm i hover.css
在文件angular.json属性projects.architect.build.options.styles——>将这一行添加到数组:node_modules/hover.css/scss/hover.scss

在你想要效果的元素上使用它们的任何类，即:

<div *ngFor="let source of sources">
<div class="row justify-content-center">
<div class="col-12 hvr-glow">
<!-- My content -->
</div>
</div>
</div>

Angular 2 Hover事件

更新