leporello-js/record_io/fetch.html

<script type='module'>

const original = globalThis.fetch
globalThis.fetch = function(...args) {
  console.log('fetch called')
  return original.apply(null, args)
}

for(let key of [
                'arrayBuffer',
                'blob',
                'formData',
                'json',
                'text',
               ]) {

  let original = Response.prototype[key]
  Response.prototype[key] = function(...args){
    console.log('key called', key)
    return original.apply(this, args)
  }
}

console.log((await (await fetch('/')).text()).length)



</script>