[Webkit-unassigned] [Bug 36314] New: Text field "onchange" event is triggered if actual value unchanged

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=36314

           Summary: Text field "onchange" event is triggered if actual
                    value unchanged
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Mac OS X 10.5
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: ivo.krab at rvponp.fgov.be


When the user types into a text field (input type="text" or textarea) something
that does not actually change the value of the field (i.e. the typed value is
identical to the original value), blurring the field triggers the "onchange"
event anyway.

This is unintuitive behavior and inconsistent with other browsers (FireFox, IE,
although Opera behaves the same).

"onchange" should only be triggered if the new value is different from the
original one.

In the attached test case, for comparison there is also a <select>: if one goes
through the list and ends up seleting the same value as before, no onchange is
triggered, only if the value actually changed.

For the text input and textarea, though, typing an "l" over the last letter "l"
results in an "onchange" after moving the focus away.

Confirmed on r56152.

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