https://pronuncian.com/podcasts/episode2

pronuncian.com.podcasts.scripts.download.inbrowser.js

window.copy = copy;

(function(console){
  console.save = function(data, filename){

    if(!data) {
        console.error('Console.save: No data')
        return;
    }

    if(!filename) filename = 'console.json'

    if(typeof data === "object"){
        data = JSON.stringify(data, undefined, 4)
    }

    var blob = new Blob([data], {type: 'text/json'}),
        e    = document.createEvent('MouseEvents'),
        a    = document.createElement('a')

    a.download = filename
    a.href = window.URL.createObjectURL(blob)
    a.dataset.downloadurl =  ['text/json', a.download, a.href].join(':')
    e.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null)
    a.dispatchEvent(e)
 }
})(console);


(function(){
  var last = 221;
  downloadAllFrom(1);

  function downloadAllFrom(i) {
    if(i > last){
      return console.log('success');
    } else {
      downloadOne(i).then(() => downloadAllFrom(i+1))
    }
  }

  function downloadOne(i) {
    return fetch('./episode'+i).then(
      res => res.status !== 404 ? res.text() : ''
    ).then(
      body => {
        body && console.save(body, 'episode'+i+'.html');
        body ? console.log(i + ' ok') : console.log(i + ' 404');
        return;
      }
    )
  }
}());