SOURCE

// 模块
var S = (function(window){
  
  var config = {
    key: 'data'
  },
  api = {
    init: init,
    set: set,
    get: get,
    remove: remove
  }
  
  function init(){
    config = arguments[0] !== (void 0) ? arguments[0] : config;
  }
  
  
  function set(key, value){
    key = key || config.key
    window.localStorage.setItem(key, value)
  }
  function get(key){
    key = key || config.key
    return window.localStorage.getItem(key)
  }
  function remove(key){
    key = key || config.key
     window.localStorage.removeItem(key)
  }
  return api;
})(window)

// S.set('data', 'caoxinjin123456')
S.init({key:'k'})
S.set('k', 'xxx')
console.log(S.get())