mutation observer that works

Change class name on click in jQuery

by ian_smithz

HTML

<div id="sticky-right-content">
xxx
</div>


<script>

var times = 10;

function changeDiv() {
    $('#sticky-right-content').append('<br/>Here is more content!');
    if (times > 0) {
        setTimeout(function(){
            times--;
            changeDiv();            
        }, 3000);
    }
}
changeDiv();

</script>

JavaScript

// Select the node that will be observed for mutations
const targetNode = document.getElementById('sticky-right-content');

// Options for the observer (which mutations to observe)
const config = { attributes: true, childList: true, subtree: true };

// Callback function to execute when mutations are observed
const listerCallback = function(mutationsList, observer) {
    // Use traditional 'for loops' for IE 11
    for(let mutation of mutationsList) {
        if (mutation.type === 'childList') {
            console.log('A child node has been added or removed.');
        }
        else if (mutation.type === 'attributes') {
            console.log('The ' + mutation.attributeName + ' attribute was modified.');
        }
    }
};

// Create an observer instance linked to the callback function
const observer = new MutationObserver(listerCallback);

// Start observing the target node for configured mutations
observer.observe(targetNode, config);

// Later, you can stop observing
//observer.disconnect();