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There are many possible solutions to this.
You could use a cache in back-end suchlike Redis, or as you said, cache it in the front-end.
You can abstract this caching with a get function which will check a maximum threshold of cache age.
For example, you can set it to last for 15 minutes. If another request is made before it you could answer with the last obtained data, else it will request the data to the server again.
Source:stackexchange.com