Method renderStarted

src/custom-element.js:2006–2010

* An implementation can call this method to signal to the element that * it has started rendering. * @package @final

()

     * @package @final
     */
    renderStarted() {
      this.signals_.signal(CommonSignals_Enum.RENDER_START);
      this.togglePlaceholder(false);
      this.toggleLoading(false);
    }

    /**
     * Whether the loading can be shown for this element.