> Mutation observers are very, very bad for performance.
No, they are not. Mutation events are tragic for performance and are deprecated (Chrome will make that pretty obvious in the console). The Mutation Observer was designed to have reasonable performance characteristics. It's still a very active listener, but rarely is it a bottleneck.
No, they are not. Mutation events are tragic for performance and are deprecated (Chrome will make that pretty obvious in the console). The Mutation Observer was designed to have reasonable performance characteristics. It's still a very active listener, but rarely is it a bottleneck.
more: https://developers.google.com/web/updates/2012/02/Detect-DOM...