utils.js

/**
 * @param {string} value
 * @returns {string}
 */
export function escapeHTML(value) {
  return value
    .replace(/&/g, '&')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/"/g, '&quot;')
    .replace(/'/g, '&#x27;');
}

/**
 * performs a shallow merge of multiple objects into one
 *
 * @template T
 * @param {T} original
 * @param {Record<string,any>[]} objects
 * @returns {T} a single new object
 */
export function inherit(original, ...objects) {
  /** @type Record<string,any> */
  const result = Object.create(null);

  for (const key in original) {
    result[key] = original[key];
  }
  objects.forEach(function(obj) {
    for (const key in obj) {
      result[key] = obj[key];
    }
  });
  return /** @type {T} */ (result);
}