If you want to perform a hover like event on any HTML element, then you can do it like this.

HTML

 <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>

Component

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);   }}

You should use both mouseenter and mouseleave events in order to fully implement functional hover events in angular 2.

yes there is on-mouseover in angular2 instead of ng-Mouseover like in angular 1.x so you have to write this :-

<div on-mouseover='over()' style="height:100px; width:100px; background:#e2e2e2">hello mouseover</div>over(){    console.log("Mouseover called");  }

As @Gunter Suggested in comment there is alternate of on-mouseover we can use this too. Some people prefer the on- prefix alternative, known as the canonical form.

Update

HTML Code -

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

Controller/.TS Code -

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");  }}

Working Example

Some other Mouse events can be used in Angular -

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

You can do it with a host:

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;  }}

Just adapt it to your code (found at: https://angular.io/docs/ts/latest/guide/attribute-directives.html )