libs-js/src/localStorage.js

零散的工具函数，无依赖

const _is_local_storage = !!window.localStorage;
let _data_local_dom, _dataLocalDom_name = window.location.hostname || 'localUserData';
if (!_is_local_storage) {
    try {
        _data_local_dom = document.createElement('input');
        _data_local_dom.type = 'hidden';
        _data_local_dom.style.display = "none";
        _data_local_dom.addBehavior('#default#userData'); //userData的语法
        document.body.appendChild(_data_local_dom);
        _data_local_dom.expires = new Date($.date().addDays(365)).toUTCString(); //设定过期时间
        //加载userdata
        _data_local_dom.load(_dataLocalDom_name);
    } catch (e) {
        _data_local_dom = null;
        console.log("userData初始化失败！");
    }
}
export const local_storage = (key, value) => {
    var _return_value;
    if (_is_local_storage) {
        if (value != undefined) {
            localStorage.setItem(encodeURIComponent(key), encodeURIComponent(value));
        } else {
            _return_value = localStorage.getItem(encodeURIComponent(key));
            return _return_value ? decodeURIComponent(_return_value) : null;
        }
    } else if (_data_local_dom) {
        if (value != undefined) {
            _data_local_dom.setAttribute(key, value);
            _data_local_dom.save(_dataLocalDom_name);
        } else {
            _return_value = _data_local_dom.getAttribute(key);
            return _return_value ? decodeURIComponent(_return_value) : null;
        }
    }
};
export const remove_local_storage_item = (key) => {
    if (_is_local_storage) {
        localStorage.removeItem(encodeURIComponent(key));
    } else if (_data_local_dom) {
        _data_local_dom.removeAttribute(encodeURIComponent(key));
        _data_local_dom.save(_dataLocalDom_name);
    }
}
export const clear_local_storage = () => {
    if (_is_local_storage) {
        localStorage.clear();
    } else {
        _data_local_dom.remove();
    }
};