How can I implement caching with the Fetch API in TypeScript?

How can I implement caching with the Fetch API in TypeScript?

You can implement caching by using the Cache API along with the Fetch API. First, check if the response is in the cache before making a network request.

Can you show me a code example?

Sure! Here's a simple example:

async function fetchWithCache(url: string) {
    const cache = await caches.open('my-cache');
    const cachedResponse = await cache.match(url);
    if (cachedResponse) {
        return cachedResponse;
    }
    const response = await fetch(url);
    cache.put(url, response.clone());
    return response;
}

What if the data changes frequently?

In that case, you might want to implement a cache expiration strategy, where you set a time limit for how long the cached data is valid.

How can I implement cache expiration?

You can store a timestamp along with the cached response and check it before returning the cached data. If it's expired, fetch new data.