每个微信小程序都可以有自己的本地缓存同一个微信用户，同一个小程序 storage 上限为 10MB。
| 操作 | 异步方法 | 同步方法 |
| 插入 | wx.setStorage | wx.setStorageSync |
| 读取 | wx.getStorage | wx.getStorageSync |
| 删除 | wx.removeStorage | wx.removeStorageSync |
| 清空 | wx.clearStorage | wx.clearStorageSync |
| 获取当前缓存信息 | wx.getStorageInfo | wx.getStorageInfoSync |
示例代码：
wx.setStorage({ key:"key", data:"value"})try { wx.setStorageSync('key', 'value')} catch (e) { }wx.getStorage({ key: 'key', success: function(res) { console.log(res.data) } })try { var value = wx.getStorageSync('key') if (value) { // Do something with return value }} catch (e) { // Do something when catch error}wx.getStorageInfo({ success: function(res) { console.log(res.keys) console.log(res.currentSize) console.log(res.limitSize) }})try { var res = wx.getStorageInfoSync() console.log(res.keys) console.log(res.currentSize) console.log(res.limitSize)} catch (e) { // Do something when catch error}wx.removeStorage({ key: 'key', success: function(res) { console.log(res.data) } })try { wx.removeStorageSync('key')} catch (e) { // Do something when catch error}wx.clearStorage()try { wx.clearStorageSync()} catch(e) { // Do something when catch error}
