免插件实现wordpress调用历史浏览文章列表

ViewHistory = function() {
 
this.config = {
limit: 10,
storageKey: 'viewHistory',
primaryKey: 'url'
};
 
this.cache = {
localStorage:  null,
userData:  null,
attr:  null
};
};
 
ViewHistory.prototype = {
 
init: function(config) {
this.config = config || this.config;
var _self = this;
 
// define localStorage
if (!window.localStorage && (this.cache.userData = document.body) && this.cache.userData.addBehavior && this.cache.userData.addBehavior('#default#userdata')) {
this.cache.userData.load((this.cache.attr = 'localStorage'));
 
this.cache.localStorage = {
'getItem': function(key) {
return _self.cache.userData.getAttribute(key);
},
'setItem': function(key, value) {
_self.cache.userData.setAttribute(key, value);
_self.cache.userData.save(_self.cache.attr);
}
};
 
} else {
this.cache.localStorage = window.localStorage;
}
},
 
addHistory: function(item) {
var items = this.getHistories();
for(var i=0, len=items.length; i<len; i++) {
if(item[this.config.primaryKey] && items[i][this.config.primaryKey] && item[this.config.primaryKey] === items[i][this.config.primaryKey]) {
items.splice(i, 1);
break;
}
}
 
items.push(item);
 
if(this.config.limit > 0 && items.length > this.config.limit) {
items.splice(0, 1);
}
 
var json = JSON.stringify(items);
this.cache.localStorage.setItem(this.config.storageKey, json);
},
 
getHistories: function() {
var history = this.cache.localStorage.getItem(this.config.storageKey);
if(history) {
return JSON.parse(history);
}
return [];
}
};
 
if(typeof localStorage !== 'undefined' && typeof JSON !== 'undefined') {
var viewHistory = new ViewHistory();
viewHistory.init({
limit: 5,
storageKey: 'viewHistory',
primaryKey: 'url'
});
}
 
var wrap = document.getElementById('recently_viewed');
// 如果 ViewHistory 的实例存在，则可以将页面信息写入。
if(viewHistory) {
var page = {
"title": document.getElementsByTagName('title')[0].innerHTML,
"url": location.href // 这是 primaryKey
// "time": new Date()
// "author": ...
// 这里可以写入更多相关内容作为浏览记录中的信息
};
viewHistory.addHistory(page);
} 
// 如果 ViewHistory 的实例存在，并且外层节点存在，则可显示历史浏览记录
if(viewHistory && wrap) {
// 获取浏览记录
var histories = viewHistory.getHistories();
 
// 组装列表
var list = document.createElement('ul');
if(histories && histories.length > 0) {
for(var i=histories.length-1; i>=0; i--) {
var historyItem = histories[i];
 
var item = document.createElement('li');
var itemLink = document.createElement('a');
itemLink.href = historyItem.url;
itemLink.innerHTML = historyItem.title;
 
item.appendChild(itemLink);
list.appendChild(item);
}
 
// 插入页面特定位置
wrap.appendChild(list);
}
}

<script type="text/javascript" src="<?php bloginfo('template_url'); ?>/js/history.js"></script>

<div id="recently_viewed"></div>