🚨 Get Your Free NFT Certificate Mint by Completing the Web3 Exam! START NOW

Code has been added to clipboard!

jQuery .mouseenter(): Attach Event Handlers to mouseenter Event

Reading time 1 min
Published Jan 9, 2018
Updated Oct 10, 2019

jQuery mouseenter: Main Tips

  • The jQuery .mouseenter() adds an event handler, running a function when the mouseenter event occurs, or triggers the event handler.
  • The mouseenter event happens once a mouse pointer enters elements.
  • Unlike an otherwise similar .mouseover() method, .mouseenter() doesn't react to event bubbling.
DataCamp
Pros
  • Easy to use with a learn-by-doing approach
  • Offers quality content
  • Gamified in-browser coding experience
  • The price matches the quality
  • Suitable for learners ranging from beginner to advanced
Main Features
  • Free certificates of completion
  • Focused on data science skills
  • Flexible learning timetable
Udacity
Pros
  • Simplistic design (no unnecessary information)
  • High-quality courses (even the free ones)
  • Variety of features
Main Features
  • Nanodegree programs
  • Suitable for enterprises
  • Paid Certificates of completion
Udemy
Pros
  • Easy to navigate
  • No technical issues
  • Seems to care about its users
Main Features
  • Huge variety of courses
  • 30-day refund policy
  • Free certificates of completion

Usage of Syntax of .mouseenter()

The .mouseenter() method in jQuery attaches an event handler, invoking a function when the mouseenter event occurs. The function can also trigger the handler for said event.

In the example below, a paragraph of text changes background color to red when a jQuery mouse enter event is detected:

Example
$("div").mouseenter(() => {
    $("div").css("background-color", "red");
});

Follow this syntax to trigger the mouseenter event handler:

$("selector").mouseenter();

Attach the event handler by using this syntax:

$("selector").mouseenter(function);

Event Bubbling with .mouseenter()

In the example below, you can see the difference between jQuery .mouseenter() and .mouseover() methods:

Example
var i = 0;
$( "div.overout" )
  .mouseover(function() {
    $( "p:first", this ).text( "mouse over" );
    $( "p:last", this ).text( ++i );
  })
  .mouseout(function() {
    $( "p:first", this ).text( "mouse out" );
  });
 
var n = 0;
$( "div.enterleave" )
  .mouseenter(function() {
    $( "p:first", this ).text( "mouse enter" );
    $( "p:last", this ).text( ++n );
  })
  .mouseleave(function() {
    $( "p:first", this ).text( "mouse leave" );
  });

As you can see, unlike .mouseover(), .mouseenter() does not support event bubbling. This means the event only triggers its handler when the cursor enters the element it is applied to, not caring about its parents or children.