是否有工作来引用其声明

Question

所以我正在构建一个带有把手的模板，我想将const totalSum附加到const sumTextSidebar。但显然它无法找到它尚未创建它。这有解决方法吗？我在下面提供了我的代码。谢谢！

function multi(element) {
  const responseSidebar = ($(element).data('sidebar-respond'));
  const responseUnder = ($(element).data('response-under'));
  const optionId = Number($(element).data('optionid')) + 1;
  const questionId = $(element).data('questionid') + 1;
  const responseUnderArea = '#quiz-alert-' + questionId;
  const sidebarId = '#sidebar-' + (questionId - 1) + '-' + (optionId - 1);
  const sidebarQuestion = '#sidebar-' + (questionId - 1);
  const responseUnderID = "#" + (questionId - 1) + "-" + (optionId - 1);
  const sumTextUnderQuestionID = '#sumTextUnder-' + (questionId - 1);
  **const sumTextSidebar** = ($(element).data('sumTextSidebar')+ totalSum);
  const sumSidebarElement = $('<li>' + sumTextSidebar + '</li>');
  const values = Number($(element).val());
  const sumSidebarId = '#sumTextID-' + questionId;

  if ($(element).is(':checked')) {
    $(sidebarId).removeClass('hidden');
    $(responseUnderID).removeClass('hidden');
    $(responseUnderArea).removeClass('hidden');
    $(sumTextUnderQuestionID).removeClass('hidden');
    if ($(sumSidebarId).length == 0) {
      $(sidebarQuestion).append(sumSidebarElement).slideDown('slow');
      sumSidebarElement.attr('id', 'sumTextID-' + questionId);
    }
    addValue.push(values)
  } else {
    $(sidebarId).addClass('hidden');
    $(responseUnderID).addClass('hidden');
    subtractValue.push(values)
  }

  function getSum(total, num) {
    return total + num;
  }

  const addValueSum = addValue.reduce(getSum);
  const subtractValueSum = subtractValue.reduce(getSum);
  **const totalSum** = addValueSum - subtractValueSum;