The browser caches the page.

The hash value is the current timestamp by adding a hash behind the URL. Build with new Date ()

Each compilation updates the HTML let
RT = (New Date ());
href= "${location.origin}/wechat/html/productlist/productlist.html?rt=${rt}"

If you need to do caching, do not update each time. You can remove the timestamp hash value on the URL compared to the time stamp difference of the current time, if more than a certain amount of time, update the hash value.
For example, to do a day of the cache, judge each time the refresh, the time to determine the URL of the hash value and the current timestamp difference is greater than 24 hours, if more than 24 hours, update the timestamp, if not greater than, will not change, continue to cache.