存储工具

# js localStorage工具

/*******************************************************
 * 设置sessionStorage缓存
 * @param  {String}        key   缓存对象key
 * @param  {String/Object} value 缓存对象value
 * @return {Boolean}             是否保存成功 true/false
 *******************************************************/
export const setSStorage = function (key, value) {
  if (arguments.length !== 2) return false;
  let v = value;
  if (typeof v === 'object') {
    v = JSON.stringify(v);
    v = 'ri-obj-' + v;
  } else {
    v = 'ri-str-' + v;
  }
  let ss = sessionStorage;
  if (ss) {
    ss.setItem(key, v);
  } else { return false; }
  return true;
};

/*********************************************
 * 获取sessionStorage缓存
 * @param  {String}        key   缓存对象key
 * @return {String/Object}       缓存对象value
 *********************************************/
export const getSStorage = function (key) {
  let ss = sessionStorage;
  if (ss) {
    let v = ss.getItem(key);
    if (!v) { return false; }
    if (v.indexOf('ri-obj-') === 0) {
      v = v.slice(7);
      return JSON.parse(v);
    } else if (v.indexOf('ri-str-') === 0) {
      return v.slice(7);
    } else { return false; }
  } else { return false; }
};

/*******************************************
 * 删除sessionStorage缓存
 * @param  {String} key  缓存对象key
 * @return {Boolean}     是否删除成功 true/false
 *******************************************/
export const removeSStorage = function (key) {
  let ss = sessionStorage;
  if (ss && key) {
    ss.removeItem(key);
    return true;
  } else { return false; }
};

/***************************************
 * 清理sessionStorage缓存
 * @return {Boolean} 是否清理成功 true/false
 ***************************************/
export const clearSStorage = function () {
  let ss = sessionStorage;
  if (ss) {
    ss.clear();
    return true;
  } else { return false; }
}

/*******************************************************
 * 设置localStorage缓存
 * @param  {String}        key   缓存对象key
 * @param  {String/Object} value 缓存对象value
 * @return {Boolean}             是否保存成功 true/false
 *******************************************************/
export const setLStorage = function (key, value) {
  if (arguments.length !== 2) return false;
  let v = value;
  if (typeof v === 'object') {
    v = JSON.stringify(v);
    v = 'ri-obj-' + v;
  } else {
    v = 'ri-str-' + v;
  }
  let ls = localStorage;
  if (ls) {
    ls.setItem(key, v);
  } else { return false; }
  return true;
};

/*********************************************
 * 获取localStorage缓存
 * @param  {String}        key   缓存对象key
 * @return {String/Object}       缓存对象value
 *********************************************/
export const getLStorage = function (key) {
  let ls = localStorage;
  if (ls) {
    let v = ls.getItem(key);
    if (!v) { return false; }
    if (v.indexOf('ri-obj-') === 0) {
      v = v.slice(7);
      return JSON.parse(v);
    } else if (v.indexOf('ri-str-') === 0) {
      return v.slice(7);
    } else { return false; }
  } else { return false; }
};

/*******************************************
 * 删除localStorage缓存
 * @param  {String} key  缓存对象key
 * @return {Boolean}     是否删除成功 true/false
 *******************************************/
export const removeLStorage = function (key) {
  let ls = localStorage;
  if (ls && key) {
    ls.removeItem(key);
    return true;
  } else { return false; }
};

/***************************************
 * 清理localStorage缓存
 * @return {Boolean} 是否清理成功 true/false
 ***************************************/
export const clearLStorage = function () {
  let ls = localStorage;
  if (ls) {
    ls.clear();
    return true;
  } else { return false; }
}

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更新时间: 3/26/2021, 9:15:55 AM

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