Conversion between camelCase and kebab-case, using the DOM.

convert.js

/**
 * Convert kebab-case to camelCase.
 * @param {string} kebabString The kebab-case string to convert.
 * @return {string} The string converted to camelCase.
 */
function camelCase(kebabString) {
  const div = document.createElement('div');
  div.setAttribute(`data-${kebabString}`, '');
  return Object.keys(div.dataset)[0];
}

/**
 * Convert camelCase to kebab-case.
 * @param {string} camelString The camelCase string to convert.
 * @return {string} The string converted to kebab-case.
 */
function kebabCase(camelString) {
  const div = document.createElement('div');
  div.dataset[camelString] = '';
  return div.attributes[0].name.substr(5);
}