fix: [#1952] Fix Document nodes rejected as boundary points in Selection API #1954
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…s in Selection API
skoch13
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Fixes #1952
Selection API methods were rejecting Document nodes as boundary points because
document.ownerDocumentisnull. The validation now accepts nodes that are either the document itself or have a matching ownerDocument.Fixed methods:
collapse()extend()selectAllChildren()setBaseAndExtent()Tests: Added coverage for all four methods with Document nodes.