How to change the HTML content as it’s loading on the page
The docs on MDN have a generic incomplete example and don’t showcase the common pitfalls. Mutation summary library provides a human-friendly wrapper, but like all wrappers it adds overhead. See Performance of MutationObserver to detect nodes in entire DOM. Create and start the observer. Let’s use a recursive document-wide MutationObserver that reports all added/removed nodes. … Read more