Js函数仅在调试模式下起作用，而在其他情况下则不起作用

Question

我的借书功能仅在调试模式下起作用，而在其他情况下则不起作用。关于如何解决的任何想法？我也曾尝试删除警报，但没有结果。控制台中没有错误。

function LoanBook(e) {
  let target = e.target.parentElement.parentElement;
  let bookID = target.attributes[0].value;
  let dueDate = DueDateGenerator();
  let dataToSend = {
    dueDate: dueDate
  };
  let query_url = base_url + users_url + `/${userID}/loans/${bookID}`;
  UiElements.SearchResultViewer.innerHTML = "";
  UiElements.SearchResultViewer.style.display = "none";
  UiElements.ShowLoanBooksUl.innerHTML = "";
  UiElements.showUserLoansDiv.style.display = "none";
  SavingData(query_url, dataToSend)
    .then(response => {
      alert(`Book loaned. Due Date: ${dueDate}.`);
      UiElements.showUserLoansDiv.style.display = "grid";
      UiElements.SearchResultViewer.style.display = "grid";
      GetUserLoanedBooks();
    })

  e.preventDefault()
}