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(function () {
const stackedCardsSection = document.getElementById("stacked-cards-section");
const stickyHeader = stackedCardsSection.children[0];
const stackedCards = document.getElementById("stacked-cards");
const cardsArray = Array.from(stackedCards.children);
const cardsHeights = cardsArray.map(
(card) => card.children.item(0).getBoundingClientRect().height
);
const mobileAndTabletCheck = function () {
let check = false;
(function (a) {
if (
/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino|android|ipad|playbook|silk/i.test(
a
) ||
/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(
a.substr(0, 4)
)
)
check = true;
})(navigator.userAgent || navigator.vendor || window.opera);
return check;
};
if (mobileAndTabletCheck() || window.innerWidth < 1024) {
stackedCards.style.gap = "var(--cardMargin)";
cardsArray.forEach((card) => (card.style.position = "relative"));
stickyHeader.style.position = "relative";
return;
}
const percentageSeen = (element, offset) => {
// Get the relevant measurements and positions
const viewportHeight = window.innerHeight;
const scrollTop = window.scrollY;
const elementOffsetTop = element.offsetTop;
const elementHeight = element.offsetHeight;
// Calculate percentage of the element that's been seen
const distance = scrollTop + viewportHeight - elementOffsetTop - offset;
const percentage = Math.round(
distance / ((viewportHeight + elementHeight) / 100)
);
// Restrict the range to between 0 and 100
return Math.min(100, Math.max(0, percentage));
};
cardsArray.forEach((card) => {
card.style.top = `calc(${
stickyHeader.getBoundingClientRect().height + "px"
} + var(--cardsSectionGap) + calc(var(--index) * var(--cardTopPadding)))`;
});
const headerBottomStop = +getComputedStyle(stackedCardsSection)
.getPropertyValue("--cardsHeaderBottomStop")
.slice(0, -2);
document.addEventListener("scroll", function () {
const percentageOfSecondCardSeen = percentageSeen(
cardsArray[1],
64 + stackedCardsSection.offsetTop
);
const percentageOfThirdCardSeen = percentageSeen(
cardsArray[2],
128 + stackedCardsSection.offsetTop
);
if (
Math.abs(
stickyHeader.getBoundingClientRect().bottom -
stackedCardsSection.getBoundingClientRect().bottom
) <
headerBottomStop + cardsHeights[2]
) {
stickyHeader.children.item(
0
).style.paddingBottom = `calc(var(--cardsHeaderBottomStop) + ${
cardsHeights[2] + "px"
})`;
} else {
stickyHeader.children.item(0).style.paddingBottom = "";
}
cardsArray[0].children.item(0).style.scale =
1 -
(0.1 * percentageOfSecondCardSeen) / 100 -
(0.1 * percentageOfThirdCardSeen) / 100;
cardsArray[0].children.item(0).style.opacity =
1 -
(0.1 * percentageOfSecondCardSeen) / 100 -
(0.1 * percentageOfThirdCardSeen) / 100;
cardsArray[0].children.item(0).style.filter = `blur(${
(10 * Math.max(percentageOfSecondCardSeen - 0.2, 0)) / 100 +
(10 * Math.max(percentageOfThirdCardSeen - 0.2, 0)) / 100
}px)`;
cardsArray[0].style.paddingBottom = `calc(
var(--cardTopPadding) * 2 - ${cardsHeights[0] - cardsHeights[2]}px
)`;
cardsArray[1].children.item(0).style.scale =
1 - (0.1 * percentageOfThirdCardSeen) / 100;
cardsArray[1].children.item(0).style.opacity =
1 - (0.1 * percentageOfThirdCardSeen) / 100;
cardsArray[1].children.item(0).style.filter = `blur(${
(10 * Math.max(percentageOfThirdCardSeen - 0.2, 0)) / 100
}px)`;
cardsArray[1].style.paddingBottom = `calc(
var(--cardTopPadding) - ${cardsHeights[1] - cardsHeights[2]}px
)`;
});
})();
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