[Webkit-unassigned] [Bug 86964] New: Unsupported commands should have queryCommandValue() = "", not false

Sun May 20 07:59:01 PDT 2012

https://bugs.webkit.org/show_bug.cgi?id=86964

           Summary: Unsupported commands should have queryCommandValue() =
                    "", not false
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML Editing
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: ayg at aryeh.name
                CC: ap at webkit.org

Test-case:

data:text/html,<!doctype html>
<script>
var val = document.queryCommandValue("quasit");
alert(typeof val + ' "' + val + '"');
</script>

Chrome 20 dev alerts 'boolean "false"'.  This means queryCommandValue() is returning a boolean, when it's specced to always return a string.  Gecko now returns the empty string, per spec <https://bugzilla.mozilla.org/show_bug.cgi?id=742240#c18>.  IE throws, which we decided in bug 83993 was not acceptable.  WebKit should return the empty string here.  This probably doesn't have big compat impact, because false == "" in JavaScript.

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