localStorage与sessionStorage设置与获取

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function _getItem (name) {
  try {
    return JSON.parse(this.getItem(name))
  } catch (e) {
    return null
  }
}

function _setItem (name, value) {
  try {
    this.setItem(name, JSON.stringify(value))
  } catch (e) {}
}

const local = {
  getItem (name) { return _getItem.call(localStorage, name) },
  setItem (name, value) { _setItem.call(localStorage, name, value) }
}

const session = {
  getItem (name) { return _getItem.call(sessionStorage, name) },
  setItem (name, value) { _setItem.call(sessionStorage, name, value) }
}

export {
  local,
  session
}