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How to disable mouseout events triggered by child elements?
  • Last Updated : 16 Jul, 2020

In this article, we shall discuss how to avoid triggering unwanted “mouseout” events from child elements due to event bubbling. This maneuver can be achieved by listening to the following events instead of “hover”, or “mouseover” and “mouseout” events :

  1. onmouseenter: This event is triggered when the cursor/pointer moves onto an element. This event does not propagate upwards to parent elements hence it can be used in circumstances where event bubbling is eliminated.
  2. onmouseleave: This event is triggered when the cursor/pointer moves out of an element. On “mouseenter”, this event does not propagate up the document in the hierarchy.
  • JS Code: The example is implemented using Vanilla JavaScript.

    JavaScript

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    window.addEventListener('load', ()=>{
        const parent = document.querySelector('.parent');
        const child1 = document.querySelector('.child1');
        const child2 = document.querySelector('.child2');
        const enter = 'Inside';
        const exit = 'Outside';
        parent.addEventListener('mouseenter', ()=>{
            child1.innerText = enter;
            child2.innerText = enter;
        });
        parent.addEventListener('mouseleave', ()=>{
            child1.innerText = exit;
            child2.innerText = exit;
        });  
    });

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  • JS Code: jQuery part of the implementation.

    JavaScript



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    $('document').ready(()=>{
        $('.parent').on({
            'mouseenter': () =>{
                  
                $('.child1').text('inside');
                $('.child2').text('inside');
            },
            'mouseleave' : () => {
                $('.child1').text('outside');
                $('.child2').text('outside');
            }
        });
    });

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  • Final Code:

    HTML

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    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" 
              content="width=device-width, initial-scale=1.0">
        <title>
         Disable mouseout events triggered by child elements
        </title>
    integrity="sha256-9/aliU8dGd2tb6OSsuzixeV4y/faTqgFtohetphbbj0="
        crossorigin="anonymous">
       </script>
    </head>
    <body>
        <h2 style = "color: green;">Geeks for Geeks</h2>
        <div class="parent">
            <div class="child1">Child 1</div>
            <div class="child2">Child 2</div>
        </div>
    </body>
    <style>
        .parent{
            width: 400px;
            height: 400px;
            border: 2px Solid black;
            display: flex;
            align-items: center;
            justify-content: space-evenly;
            background-color: green;
        }
        .parent > div{
            width: 150px;
            height: 300px;
            border: 2px solid black;
            text-align: center;
            line-height: 280px;
            display: inline-block;
            font-family:'Courier New', Courier, monospace;
            font-size: larger;
            font-weight: bolder;
            color: black;
            background-color:yellow;
        }
    </style>
    <script type="text/javascript">
        window.addEventListener('load', ()=>{
            const parent = document.querySelector('.parent');
            const child1 = document.querySelector('.child1');
            const child2 = document.querySelector('.child2');
            const enter = 'Inside';
            const exit = 'Outside';
            parent.addEventListener('mouseenter', ()=>{
                child1.innerText = enter;
                child2.innerText = enter;
            });
            parent.addEventListener('mouseleave', ()=>{
                child1.innerText = exit;
                child2.innerText = exit;
            });
              
        });
    </script>
    </html>

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    Output:

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