使用localStorage替代cookie做本地存储

late = {
 storage : {},
 isinit : 0,
 maxnum : 10,
 key : 'vestigial',
 _init:function(){
  if (late.isinit === 1) {
   return true;
  } else if (late.isinit === 0 && window.localStorage) {
   late.isinit = 1;
   late.storage = window.localStorage;
   return true;
  } else {
   return false;
  }
 },
 
 get:function(){
  if(late._init()){
   var data = late.storage.getItem(late.key);
   return JSON.parse(data);
  }else{
   return false;
  }
 },
 
 set:function(value){
  if(late._init()){
   var data = late.storage.getItem(late.key); 
   data = JSON.parse(data);
   if(data === null){
    data = [];
   }
   if (data.length === 10) {
    data.shift();
   }
   data.push(value);
   data = JSON.stringify(data);
   late.storage.setItem(late.key, data);
   return true;
  }else{
   return false;
  }
 }
};
 
var obj = {
  id:2, 
  title:'标题1', 
  url:'http://www.baidu.com'
 };
late.set(obj);
var each = late.get();
var eachlength = each.length;
for(i=0; i<eachlength; i++){
 document.writeln(JSON.stringify(each[i]));
}