Method overflowCallback

src/custom-element.js:2100–2129

* Hides or shows the overflow, if available. This function must only * be called inside a mutate context. * @param {boolean} overflown * @param {number|undefined} requestedHeight * @param {number|undefined} requestedWidth * @package @final

(overflown, requestedHeight, requestedWidth)

     * @package @final
     */
    overflowCallback(overflown, requestedHeight, requestedWidth) {
      this.getOverflowElement();
      if (!this.overflowElement_) {
        if (overflown && this.warnOnMissingOverflow) {
          user().warn(
            TAG,
            'Cannot resize element and overflow is not available',
            this
          );
        }
      } else {
        this.overflowElement_.classList.toggle('amp-visible', overflown);

        if (overflown) {
          this.overflowElement_.onclick = () => {
            const mutator = Services.mutatorForDoc(this.getAmpDoc());
            mutator.forceChangeSize(this, requestedHeight, requestedWidth);
            mutator.mutateElement(this, () => {
              this.overflowCallback(
                /* overflown */ false,
                requestedHeight,
                requestedWidth
              );
            });
          };
        } else {
          this.overflowElement_.onclick = null;
        }
      }
    }

    /**
     * Mutates the element using resources if available.