Enable Disable Multiple File

function disableMultipleFile(multipleFileId) {

    let multipleFile = document.querySelector('#'+ multipleFileId +' button');
  
    multipleFile.classList.remove('btn-uploadfile');
    multipleFile.classList.add('btn-uploadfile-disabled');
}

function enableMultipleFile(multipleFileId) {

    let multipleFile = document.querySelector('#'+ multipleFileId +' button');
  
    multipleFile.classList.remove('btn-uploadfile-disabled');
    multipleFile.classList.add('btn-uploadfile');
}