Uncaught TypeError: Cannot read properties of undefined (reading ‘classList’)

Bootstrap 5.x使用Modal报错：Uncaught TypeError: Cannot read properties of undefined (reading 'classList')，那是由于使用的了jQuery，需要改一下写法。

原写法：

import Modal from 'bootstrap/js/src/modal'
if ($('#modalThemeBuy')) {
  const modalThemeBuy = new Modal(document.getElementById('modalThemeBuy'));
  $('#themeBuy').on('click', function () {
    modalThemeBuy.show()
  })
}

改为：

import Modal from 'bootstrap/js/src/modal'
if ($('#modalThemeBuy')) {
  const modalThemeBuy = $('#modalThemeBuy');
  $('#themeBuy').on('click', function () {
    modalThemeBuy.show()
  })
}