Function elementStringOrPassThru

src/core/error/message-helpers.js:22–29

(val)

 * @return {*}
 */
export function elementStringOrPassThru(val) {
  // Do check equivalent to `val instanceof Element` without cross-window bug
  if (isElement(val)) {
    val = /** @type {Element} */ (val);
    return val.tagName.toLowerCase() + (val.id ? `#${val.id}` : '');
  }
  return val;
}

/**
 * Tests if an error message contains the user sentinel.