Bug 156285

Summary:	Newlines lost in .innerHTML serialization of <pre> when first character is a newline
Product:	WebKit	Reporter:	Simon Pieters (:zcorpan) <zcorpan>
Component:	DOM	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED WONTFIX
Severity:	Normal	CC:	cdumez
Priority:	P2
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Simon Pieters (:zcorpan) 2016-04-06 03:43:52 PDT

The HTML spec says

> If current node is a pre, textarea, or listing element, and the first child node of the element, if any, is a Text node whose character data has as its first character a U+000A LINE FEED (LF) character, then append a U+000A LINE FEED (LF) character.

https://html.spec.whatwg.org/#html-fragment-serialisation-algorithm

This is because otherwise it doesn't round-trip correctly if the data starts with a LF.

See https://github.com/whatwg/html/issues/944

Comment 1 Simon Pieters (:zcorpan) 2016-09-23 07:08:35 PDT

https://github.com/whatwg/html/pull/1815