Method getPlaceholder

src/custom-element.js:1920–1930

* Returns an optional placeholder element for this custom element. * @return {?Element} * @package @final

()

     * @package @final
     */
    getPlaceholder() {
      return query.lastChildElement(this, (el) => {
        return (
          el.hasAttribute('placeholder') &&
          // Denylist elements that has a native placeholder property
          // like input and textarea. These are not allowed to be AMP
          // placeholders.
          !isInputPlaceholder(el)
        );
      });
    }

    /**
     * Hides or shows the placeholder, if available.