Detect, Undo And Redo DOM Changes With Mutation Observers June 4, 2014 I’ve been wondering why DOM Mutation Observers, which can monitor changes to one or more DOM elements and return a report of what changed, aren’t used more often in the wild. Mutation Observers have long-replaced DOM Mutation Events (which were deemed slow, verbose and crashy), are fairly well documented and a polyfill for IE9
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