spoike/knockout.persist — pull request #1 by GithubProfile (2013-05-20 20:24:34+00:00)
Title: Added more crossbrowser support

Using localStorage.hasOwnProperty(key) not working in Internet Explorer 8 and below(I think, not sure about version, but in some old IE, maybe IE 7 and below). Changing it to localStorage.getItem(key) !== null fixes issues in old IEs.