JAVASCRIPT

js download

function downloadURI(uri, name) 
{
    var link = document.createElement("a");
    // If you don't know the name or want to use
    // the webserver default set name = ''
    link.setAttribute('download', name);
    link.href = uri;
    document.body.appendChild(link);
    link.click();
    link.remove();
}

javascript download

<a onclick="this.href='data:text/html;charset=UTF-8,'+encodeURIComponent(document.documentElement.outerHTML)" href="#" download="page.html">Download</a>

js download

function downloadText(filename, text) {
    Object.assign(document.createElement('a'), {
      download: filename,
      href: 'data:text/plain;charset=utf-8,' + encodeURIComponent(text),
    }).click()
  }