Created
January 24, 2014 03:33
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当浏览器的history不好用的时候,可以试试这个。当然这种情况出现的概率很低
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(function($) { | |
var key = 'history:mock'; | |
var historyDb = { | |
cursor: null, | |
action: null, | |
urls: [] | |
}; | |
function saveState() { | |
sessionStorage.setItem(key, JSON.stringify(historyDb)); | |
} | |
function redirect() { | |
window.location.href = historyDb.urls[historyDb.cursor]; | |
return; | |
} | |
function init() { | |
var h = sessionStorage.getItem(key); | |
!!h && (historyDb = JSON.parse(h)); | |
if (historyDb.action!==null) { //前进后退上下文中,不对urls和cursor修改 | |
historyDb.action = null; | |
} else { // 退出前进后退上下文 | |
var urls = historyDb.urls; | |
var href = window.location.href; | |
if (urls[historyDb.cursor] !== href) { | |
urls.splice(historyDb.cursor+1); | |
urls.push(window.location.href); | |
historyDb.cursor = urls.length-1; | |
}; | |
} | |
saveState(); | |
}; | |
init(); | |
$.history = {db: historyDb}; | |
$.history.go = function(step) { | |
var cursor = historyDb.cursor+step; | |
if (cursor>historyDb.urls.length-1 || cursor<0) { | |
return; | |
} else { | |
historyDb.cursor = cursor; | |
}; | |
historyDb.action = 'go'; | |
saveState(); | |
redirect(); | |
} | |
})(jQuery) |
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要html5支持