1$( "td" ).hover(
2  	() => { //hover
3    	$(this).addClass("hover");
4  	}, 
5  	() => { //out
6    	$(this).removeClass("hover");
7  	}
8);
9
10//or
11$( "td" )
12  	.mouseover( () => {
13    	$(this).addClass("hover");
14  	}) 
15  	.mouseout( () => {
16    	$(this).removeClass("hover");
17  	}
18);
19
20//or
21$( "td" )
22  	.mouseenter( () => {
23    	$(this).addClass("hover");
24  	}) 
25  	.mouseleave( () => {
26    	$(this).removeClass("hover");
27  	}
28);

1$(document).ready(function() {
2            $("p").hover(function() {
3                $(this).css("background-color", "green");
4            }, function() {
5                $(this).css("background-color", "yellow");
6            });
7        });

1$( "div.enterleave" )
2  .mouseenter(function() {
3    n += 1;
4    $( this ).find( "span" ).text( "mouse enter x " + n );
5  })
6  .mouseleave(function() {
7    $( this ).find( "span" ).text( "mouse leave" );
8  });

1$(".selector").on({
2    mouseenter: function () {
3        //stuff to do on mouse enter
4    },
5    mouseleave: function () {
6        //stuff to do on mouse leave
7    }
8});
9

1
2$("#p1").hover(function(){
3
4  alert("You entered p1!");
5
6 },
7
8 function(){
9
10  alert("Bye! You now leave p1!");
11
12});
13 

1$( selector ).mouseenter( handlerIn ).mouseleave( handlerOut );