text: function convBase64() {
      const files = document.getElementById('input_file').files;
      if(files.length > 0) {
          const file = files[0];
          const readerFile = new FileReader()
          readerFile.onload = loadEvent => {
              const stringBase64 = loadEvent.target.result;
              const ImageElemet = document.createElement('img');
              ImageElemet.src = stringBase64;
              ImageElemet.id = 'base64holder';
              document.getElementById('idImageHolder').innerHTML = ImageElemet.outerHTML;
              document.getElementById('input_base64').value = `${stringBase64}`
          }
          readerFile.readAsDataURL(file);
      }
  }