var timestamp = Date.parse(new Date());
var expiration = timestamp + 1800000; //缓存30分钟
var data_expiration = wx.getStorageSync("data_expiration");
if (data_expiration) {
if (timestamp > data_expiration) {
wx.clearStorageSync()
wx.setStorageSync("data_expiration", expiration)
}
} else {
wx.setStorageSync("data_expiration", expiration)
}
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