First abroach

bypassCacheFetch-v1.js

// this function accepts the same input and returns the same output as window.fetch(),
// plus, it adds a ramdom param into the URL to bypass cache.
const bypassCacheFetch = (input, init) => {
  let bypassCacheUrl
  if (input.includes('?') {
    bypassCacheUrl = input + '&_v=' + Math.random()
  } else { 
    bypassCacheUrl = input + '?_v=' + Math.random()
  }
  
  return fetch(bypassCacheUrl, init)
}

// usage:
async getData(){
  const response = await bypassCacheFetch('http://my.api.com/data.json')
  const json = await response.json()
  // ...
}