[Webkit-unassigned] [Bug 142151] New: history.replaceState/location.replace incorrectly adds new entries to history

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=142151

            Bug ID: 142151
           Summary: history.replaceState/location.replace incorrectly adds
                    new entries to history
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jason.davies at gmail.com

The purpose of history.replaceState is to *modify* the current history entry.  This works in the context of using the back button.

However, it always seems to add *new* history entries, in the context of the History menu item (and "Show History" page).

This causes a huge number of history entries for pages that update the URL frequently, e.g. zoom/pan of maps where the current zoom and position are encoded in the URL.

A good example of this in the wild is http://polymaps.org/ - e.g. http://polymaps.org/ex/midnight-commander.html - note that Polymaps actually uses location.replace internally with the same problem, though using history.replaceState doesn't fix it.

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