Thanks! Please check your inbox to confirm your subscription. If you haven’t previously confirmed a subscription to a Mozilla-related newsletter you may have to do so. Please check your inbox or your spam filter for an email from us. smaug The right link to the spec is http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#mutation-observers Also, the API will be un-prefix very soon. We want to
![DOM MutationObserver – reacting to DOM changes without killing browser performance. – Mozilla Hacks - the Web developer blog](https://cdn-ak-scissors.b.st-hatena.com/image/square/8f043099b608abf8384b24171faa177d3698e62e/height=288;version=1;width=512/https%3A%2F%2Fhacks.mozilla.org%2Fwp-content%2Fthemes%2FHax%2Fimg%2Fhacks-meta-image.jpg)