Find all messages in web telegram and save them to file

findAllWebTelegramMessages.js

const filter = "the text by which messages will be filtered"
const fileName = "file.json"

function stripHtml(html){
   const tmp = document.createElement("DIV")
   tmp.innerHTML = html
   return tmp.textContent || tmp.innerText || ""
}

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

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

    const 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)
 }


// New web telegram version - `user-last-message` class in search box
const messagesElements = document.getElementsByClassName("im_message_text")

// change filter or map to modify messages if required
const messages = Array.from(messagesElements).
                   filter(el => el.innerHTML.includes(filter)).
                   map(el => {
                      /*el -> div object*/
                      /*use stripHtml(el.innerHTML) to get text*/
                      /*
                        Just some example....
                        const text = stripHtml(el.innerHTML)
                        const [url, chapter] = text.split(` - `);
                        return {url, chapter};
                      */
                      return el;
                   })

saveAs(messages, fileName)