<html> <head> <title>Chrome History API Data Artifact</title> </head> <body> <p>This demo demonstrates an issue with Google Chrome versions 8-10 (possibly 11) where if you push a state with data, then do history.back to the initial state, the event.state will contain the pushed states data instead of being null.</p> <p>Note: The issue requires a clean history list, as such this should always be opened in a new tab/window where there are no prior history items.</p> <p>Reported by <a href="http://balupton.com">Benjamin Lupton</a> author of <a href="http://github.com/balupton/history.js">History.js</a></p> <button id="bug">bug</button> <button id="reset">reset</button> <textarea id="log" style="width:100%;height:200px;margin-top:1em;"></textarea> <script type="text/javascript"> (function(){ window.onpopstate = function(event) { var message = ("onpopstate: location: " + document.location.href + ", data: " + JSON.stringify(event.state)); document.getElementById('log').innerHTML += message+"\n\n"; }; document.getElementById('bug').onclick = function(){ setTimeout(function(){ history.pushState({state:'new'},'New State','?new'); },1e3); setTimeout(function(){ history.back(); },2e3); }; document.getElementById('reset').onclick = function(){ document.location.href = document.location.href.replace(/[\#\?].*/,""); }; })(); </script> </body> </html>