本地存储的兼容解决方案

本地存储的兼容解决方案.js

var localStorageAdapter = {

    storeName: 'NTESBBS',

    isLocalStorage: window.localStorage ? true : false,

    dataDOM: this.isLocalStorage ? null : (function () {
        try {
            var dataDOM = document.createElement('input'),
                expires = new Date();

            dataDOM.type = 'hidden';
            dataDOM.style.display = 'none';
            dataDOM.addBehavior('#default#userData');
            document.body.appendChild(dataDOM);

            expires.setDate(expires.getDate() + 30);
            dataDOM.expires = expires.toUTCString();

            return dataDOM;
        } catch (ex) {
            return null;
        }
    })(),

    set: function (key, value) {
        var dataDOM = this.dataDOM;

        if (this.isLocalStorage) {
            window.localStorage.setItem(key, value);
        } else {
            if (dataDOM) {
                dataDOM.load(this.storeName);
                dataDOM.setAttribute(key, value);
                dataDOM.save(this.storeName);
            }
        }
    },

    get: function (key) {
        var dataDOM = this.dataDOM;

        if (this.isLocalStorage) {
            return window.localStorage.getItem(key);
        } else {
            if (dataDOM) {
                dataDOM.load(this.storeName);
                return dataDOM.getAttribute(key);
            }
        }
    },

    remove: function (key) {
        var dataDOM = this.dataDOM;

        if (this.isLocalStorage) {
            window.localStorage.removeItem(key);
        } else {
            if (dataDOM) {
                dataDOM.load(this.storeName);
                dataDOM.removeAttribute(key);
                dataDOM.save(this.storeName);
            }
        }
    }
}