const characterReferences = {'"': 'quot', '&': 'amp', '<': 'lt', '>': 'gt'};

/**
 * Encode only the dangerous HTML characters.
 *
 * This ensures that certain characters which have special meaning in HTML are
 * dealt with.
 * Technically, we can skip `>` and `"` in many cases, but CM includes them.
 *
 * @param {string} value
 *   Value to encode.
 * @returns {string}
 *   Encoded value.
 */
function encode(value) {
  return value.replace(/["&<>]/g, replace)

  /**
   * @param {string} value
   * @returns {string}
   */
  function replace(value) {
    // @ts-expect-error Hush, it’s fine.
    return '&' + characterReferences[value] + ';'
  }
}

export { encode };
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