Method isLoadingEnabled_

src/custom-element.js:2018–2044

* Whether the loading can be shown for this element. * @param {boolean} force * @return {boolean} * @private

(force)

     * @private
     */
    isLoadingEnabled_(force) {
      // No loading indicator will be shown if either one of these conditions
      // true:
      // 1. The document is A4A.
      // 2. `noloading` attribute is specified;
      // 3. The element has already been laid out, and does not support reshowing the indicator (include having loading
      //    error);
      // 4. The element is too small or has not yet been measured;
      // 5. The element has not been allowlisted;
      // 6. The element is an internal node (e.g. `placeholder` or `fallback`);
      // 7. The element's layout is not nodisplay.

      const laidOut =
        this.layoutCount_ > 0 ||
        this.signals_.get(CommonSignals_Enum.RENDER_START);
      if (
        this.layout_ == Layout_Enum.NODISPLAY ||
        this.hasAttribute('noloading') ||
        (laidOut && !force) ||
        !isLoadingAllowed(this) ||
        query.isInternalOrServiceNode(this)
      ) {
        return false;
      }

      return true;
    }

    /**
     * Turns the loading indicator on or off.