* Improve parsing of srcset according to whatwg spec; e.g. srcset="http://example.com/size400,300/img.jpg 640w"
* Trim/normalise the output in order to conform to prior version; solely to keep tests happy
* Add test case for embedded commas in a srcset url as well as support for future possible parenthesis in descriptor string
* Drop 'future proof' test as it causes an error message in test output
1. Do not use virtual parent optimization if the mutation targets have iframe elements as children. This will cause some performance regression but will be easy to add and ship.
2. If an iframe element has already been a child of a virtual parent, add the virtual parent back to the dom.
* feat: add options to mask texts
* feat: add the default mask function
* refactor: rename options to identify the difference between mask text and mask input
* test: add tests about masking
* doc: add options about masking
* chore: bump up rrweb-snapshot version
* chore: reorder options
* feat: enable to mask texts
* feat: add the default mask function
* refactor: rename options to identify the difference between mask text and mask input
* test: add tests about masking
* speed up addHoverClass on large style sheets
* longer strings first to prevent accidental partial matches
* can add hover class when there is a multi selector with the same prefix
* tweak performance
* Sort events at start, as otherwise we risk misidentifying the last event
* Keep inserted events in the correct order, ensuring we don't misidentify the last event
- e.g. network conditions mean that 'live' events come in non-sequentially
- or so that adding custom events to an existing event works
* Ensure we maintain original ordering while inserting a new event which has an identical timestamp to an existing event. This came up with a series of mutations which had the same timestamp but needed to be applied in the correct order
* Fast track the common case of a new event being added which occurs after all prior events
1. Position of mouse was inaccurate when replaying and this PR will fix it.
2. Fix the bug that if one nested iframe has a scale transform and the position of mouse was inaccurate as well.
* fix: errors of replaying iframe records
error1:
HierarchyRequestError: Failed to execute 'appendChild' on 'Node': Nodes of type '#document' may not be inserted inside nodes of type '#document-fragment'.
code: parent.appendChild(target)
error2:
Uncaught DOMException: Failed to execute 'appendChild' on 'Node': Only one element on document allowed.
code: parent.appendChild(target);
* improve the comment for bugfix
