CodeQL is finding an issue with the classesToSelector function in swiper-element-bundle.js

  function classesToSelector(classes = '') {
    return `.${classes.trim().replace(/([\.:!+\/()[\]])/g, '\\$1') // eslint-disable-line
  .replace(/ /g, '.')}`;
  }

Incomplete string escaping or encoding: This does not escape backslash characters in the input.