make-fetch-happen

import makeFetchHappen from 'make-fetch-happen'; const fetch = makeFetchHappen.defaults({ cachePath: './my-app-cache' // path where cache will be written (and read) }); // First request: fetches from the web and caches the response fetch('https://registry.npmjs.org/make-fetch-happen') .then(res => res.json()) // download the body as JSON .then(body => { console.log(`Initial fetch: got ${body.name} from web.`); // Second request: forces a conditional request to validate cache return fetch('https://registry.npmjs.org/make-fetch-happen', { cache: 'no-cache' // instructs to revalidate with the origin }); }) .then(res => { console.log(`Conditional fetch status: ${res.status}`); // Expected 304 if cache valid return res.json().then(body => { console.log(`Conditional fetch: got ${body.name} from cache (status ${res.status}).`); }); }) .catch(error => console.error('An error occurred:', error));