MutationObserver

// Select the node that will be observed for mutations
const targetNode = document.getElementById("some-id");
// 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 callback = (mutationList, observer) => {
 for (const mutation of mutationList) {
 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(callback);
// Start observing the target node for configured mutations
observer.observe(targetNode, config);
// Later, you can stop observing
observer.disconnect();

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