[Webkit-unassigned] [Bug 156285] New: Newlines lost in .innerHTML serialization of <pre> when first character is a newline

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=156285

            Bug ID: 156285
           Summary: Newlines lost in .innerHTML serialization of <pre>
                    when first character is a newline
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML DOM
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: zcorpan at gmail.com

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

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