const onScroll = (): ?Promise<any> => {
if (!taskQueued) {
const viewport = getViewport();
taskQueued = true;
return fastdom.read(() => {
taskQueued = false;
const iframeIds = Object.keys(iframes);
if (useIO) {
visibleIframeIds.map(getDimensions).forEach(data => {
sendCoordinates(data[0], data[1]);
});
} else {
iframeIds
.map(getDimensions)
.filter(isIframeInViewport, viewport)
.forEach(data => {
sendCoordinates(data[0], data[1]);
});
}
});
}
};
layer2Animation() {
let inViewB;
if (
this.params.layerTwoAnimation === 'enabled' &&
isEnhanced() &&
!isIE10OrLess
) {
inViewB =
getViewport().height > this.adSlot.getBoundingClientRect().top;
fastdom.write(() => {
if (this.layer2) {
this.layer2.classList.add(
`ad-scrolling-text-hide${
this.params.layerTwoAnimationPosition
? `-${this.params.layerTwoAnimationPosition}`
: ''
}`
);
}
if (this.layer2 && inViewB) {
this.layer2.classList.add(
`ad-scrolling-text-animate${
this.params.layerTwoAnimationPosition
? `-${this.params.layerTwoAnimationPosition}`
: ''
}`
);
}
});
}
}