Caching REST API response to browser HTTP cache

index.js

let controller = new AbortController();
const trans = await fetch('/api/something.json',{cache: "only-if-cached", mode: "same-origin", signal: controller.signal}).then(res => {
        const date = res.headers.get("date"), dt = date ? new Date(date).getTime() : 0;
        console.log('hit cache');
        if (dt < (Date.now() - 100000)) {
                console.log('refresh time');
                // if older than 1 minute
                controller.abort()
                controller = new AbortController();
                return fetch('/api/something.json', {cache: "reload", mode: "same-origin", signal: controller.signal});
        }
        return res;
}).then(async (response) => {
        let data = await response.json();
        return data;
});
        //Do what ever you want with the response using trans variable