rrweb

Add a top-level annotation event with record.addAnnotation() and replayer.on('annotation', handler). Annotation data uses type: 'caption' or type: 'timelineMarker'. Import annotationData from @rrweb/types to type annotation data. The player can display these annotations as captions and interactive timeline markers.

Stopping a recording now releases the root document's mutation buffer and observer — previously the document observer was only disconnected, so each start/stop cycle leaked one buffer — and removes the cross-origin iframe message listener.

A same-origin iframe is observed once instead of re-observed on every full snapshot (checkoutEveryNth/checkoutEveryNms/manual takeFullSnapshot), so a single iframe mutation is no longer emitted once per checkout; its observers are also released when the iframe is removed or navigates away.

The untainted-MutationObserver helper iframe used on WebKit/Safari is reference-counted, so it is torn down only when the last observer stops and will get rebuilt for a later recording.

Disconnect shadow-DOM observers when their host is removed

Fix #1920 - normalization of '0px' in style sheets caused problems with the styled-components library, which built style elements text element by text element. Bug introduced

Improve performance of untainted dom accessors. Since #1509 we use e.g. dom.parentNode(el) instead of el.parentNode to work around libraries that modify these accessors. Slight improvement to avoid a string allocation each time one of these is called; they are on every hot path.

Improvements in efficiency of mutation handling at record time; has been identified as a problem numerous times

Ignore autoplay attribute mutations on <video>/<audio> regardless of tag-name case.

Emit custom events even when skipping over them, eg. when seeking to a specific time

Use the provided logger from player config instead of directly calling console.warn