MutationObserver - Web APIs | MDN
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015. Learn moreSee full compatibilityReport feedback The MutationObserver interface provides the ability to watch for changes being made to the DOM tree. It is designed as a replacement for the older Mutation Events feature, which was part of the DOM3 Events specific
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MutationRecord - Web APIs | MDN
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