Multiple PDF Base64 convert to single PDF file in Javascript or Jquery

we have a multiple PDF Base64 string on array object. Its convert to single PDF file in Javascript or Jquery

var base64String = “JVBERi0xLjcNCiWhs8XXDQoxIDAgb2JqDQo8PC9QYWdlcyAyIDAgUiAvVHlwZS9DYXRhbG9nPj4NCmVuZG9iag0KMiAwIG9iag0KPDwvQ291bnQgMS9LaWRzWyA0IDAgUiBdL1R5cGUvUGFnZXM+;

function openPDF() {
  console.log('open pdf clicked');
  window.open("data:application/octet-stream;base64," + base64String);
}

function openPDFv2() {
  console.log('open pdf v2 clicked');
  const container = document.querySelector('#container');
  const tempLink = document.createElement('a');
  tempLink.href = `data:application/pdf;base64,${base64String}`;
  tempLink.setAttribute('download', 'my-fancy.pdf');
  console.log('click now!', tempLink.click);
  //container.append(tempLink);
  tempLink.click();
}   

Its Working Single Base64.