Vue本地存储保留删除其余

本地存储保留删除其余

const SMS_TRUST_KEY_PREFIX = 'name'
 Vue.prototype.clearLocalStorageKeepSmsTrust = function () {
      const preserved = {}
      for (let i = 0; i < localStorage.length; i++) {
        const key = localStorage.key(i)
        if (key && key.indexOf(SMS_TRUST_KEY_PREFIX) === 0) {
          preserved[key] = localStorage.getItem(key)
        }
      }
      localStorage.clear()
      Object.keys(preserved).forEach(function (key) {
        localStorage.setItem(key, preserved[key])
      })
    }

获取到对应想保存到信息，给定值保存下来，删除全部的存储信息，重新保存之前获取到的信息