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JavaScript - onmouseout event example

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In this article, we would like to show you onmouseout event example in JavaScript.

Quick solution:

var myElement = document.querySelector('#my-element');

myElement.addEventListener('mouseout', function() {
    console.log('onmouseout event occurred.');
});

or:

<div onmouseout="handleMouseout()"> div body here... </div>

or:

var myElement = document.querySelector('#my-element');

myElement.onmouseout = function() {
    console.log('onmouseout event occurred.');
};

Note:

The onmouseout is usually used with onmouseover event. Check examples below to see how they work.

 

Practical examples

There are three common ways how to use onmouseout event:

  • with event listener,
  • with element¬†attribute,
  • with element property.

1. Event listener based example

In this section, we want to show how to use onmouseout event on div element via event listener mechanism.

// ONLINE-RUNNER:browser;

<!doctype html>
<html>
  <head>
    <style>
      body {
        padding: 0 0 0 10px;
        height: 260px;
      }
      #square {
        padding: 10px;
        height: 120px;
        width: 120px;
        border-radius: 10px;
        background: #b5edc2;
        transition: 1s;
      }
    </style>
  </head>
  <body>
    <p>Move mouse pointer onto the square:</p>
    <div id="square"/>
    <script>
      var mySquare = document.querySelector('#square'); // find element by id

      mySquare.addEventListener("mouseover", handleMouseover); // add mouseover event

      function handleMouseover(){
        mySquare.style.height = "200px";
        mySquare.style.width = "200px";
      }
      
      mySquare.addEventListener("mouseout", handleMouseout); // add mouseout event

      function handleMouseout(){
        mySquare.style.height = "120px";
        mySquare.style.width = "120px";
      }
    </script>
  </body>
</html>

2. Attribute based example

In this section, we want to show how to use onmouseout event on div element via attribute.

// ONLINE-RUNNER:browser;

<!doctype html>
<html>
  <head>
    <style>
      body {
        padding: 0 0 0 10px;
        height: 260px;
      }
      #square {
        padding: 10px;
        height: 120px;
        width: 120px;
        border-radius: 10px;
        background: #b5edc2;
        transition: 1s;
      }
    </style>
  </head>
  <body>
    <p>Move mouse pointer onto the square:</p>
    <div id="square" onmouseover="handleMouseover()" onmouseout="handleMouseout()"/>
    <script>
      var mySquare = document.querySelector('#square');

      function handleMouseover(){
        mySquare.style.height = "200px";
        mySquare.style.width = "200px";
      }

      function handleMouseout(){
        mySquare.style.height = "120px";
        mySquare.style.width = "120px";
      }
    </script>
  </body>
</html>

3. Property based example

In this section, we want to show how to use onmouseout event on div element via property.

// ONLINE-RUNNER:browser;

<!doctype html>
<html>
  <head>
    <style>
      body {
        padding: 0 0 0 10px;
        height: 260px;
      }
      #square {
        padding: 10px;
        height: 120px;
        width: 120px;
        border-radius: 10px;
        background: #b5edc2;
        transition: 1s;
      }
    </style>
  </head>
  <body>
    <p>Move mouse pointer onto the square:</p>
    <div id="square"/>
    <script>
      var mySquare = document.querySelector('#square');
      
      mySquare.onmouseover = function(){
        mySquare.style.height = "200px";
        mySquare.style.width = "200px";
      }
      
      mySquare.onmouseout = function(){
        mySquare.style.height = "120px";
        mySquare.style.width = "120px";
      }
    </script>
  </body>
</html>

JavaScript - events

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