Selection API: setBaseAndExtent(), extend(), and collapse() throw InvalidNodeTypeError for DOCTYPE

Category: DOM
Type: New or changed feature
Status: Enabled by default (Chrome 58)
Intent stage: None

Summary

These function silently normalized the specified position with DOCTYPE. However, they should throw InvalidNodeTypeError to match to Edge, Firefox, and the specification.

Standards & signals

Specification: https://www.w3.org/TR/selection-api/#selection-interface
Firefox: Shipped/Shipping
Safari: No signal
Web developers: No signals
Tracking bug: http://crbug.com/ 691422

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