Method collapseElement

src/service/mutator-impl.js:117–133

@override

(element)

  /** @override */
  collapseElement(element) {
    const box = this.viewport_.getLayoutRect(element);
    if (box.width != 0 && box.height != 0) {
      if (isExperimentOn(this.win, 'dirty-collapse-element')) {
        this.dirtyElement(element);
      } else {
        this.resources_.setRelayoutTop(box.top);
      }
    }

    const resource = Resource.forElement(element);
    resource.completeCollapse();

    // Unlike completeExpand(), there's no requestMeasure() call here that
    // requires another pass (with IntersectionObserver).
    this.resources_.schedulePass(FOUR_FRAME_DELAY_);
  }

  /** @override */
  measureElement(measurer) {