$( "div.enterleave" )
.mouseenter(function() {
n += 1;
$( this ).find( "span" ).text( "mouse enter x " + n );
})
.mouseleave(function() {
$( this ).find( "span" ).text( "mouse leave" );
});$("#id").mouseover();let test = document.getElementById("test");
// This handler will be executed only once when the cursor
// moves over the unordered list
test.addEventListener("mouseenter", function( event ) {
// highlight the mouseenter target
event.target.style.color = "purple";
// reset the color after a short delay
setTimeout(function() {
event.target.style.color = "";
}, 500);
}, false);