altinn-designsystem/source/js/production/modules/fileInputHandler.js

Altinn Design system based on Pattern Lab.

var onFileInputChange = function() {
  $('.a-js-fileInputChangeHandler').on('focus', function() {
    $('.a-js-fileInputChangeHandler').closest('label').addClass('a-custom-fileupload--focused');
  });
  $('.a-js-fileInputChangeHandler').on('blur', function() {
    $('.a-js-fileInputChangeHandler').closest('label').removeClass('a-custom-fileupload--focused');
  });
};

var onFileListDeleteClick = function(src) {
  var $fileListContainer = $(src).closest('.a-js-fileListContainer');
  $fileListContainer.prev().find('input').val('');
  $fileListContainer.hide();
  $fileListContainer.prev().show(); // show file upload btn
};