44 lines
1.5 KiB
JavaScript
44 lines
1.5 KiB
JavaScript
function isElementInViewport (el) {
|
|
var rect = el.getBoundingClientRect();
|
|
|
|
return (
|
|
rect.top >= 0 &&
|
|
rect.left >= 0 &&
|
|
rect.bottom <= (window.innerHeight || document.documentElement.clientHeight) && /* or $(window).height() */
|
|
rect.right <= (window.innerWidth || document.documentElement.clientWidth) /* or $(window).width() */
|
|
);
|
|
}
|
|
//
|
|
|
|
// little addon to enhance the carousel
|
|
|
|
|
|
Array.from(document.getElementsByClassName("carousel")).forEach((carousel) => {
|
|
let viewport = carousel.getElementsByClassName("carousel__viewport")[0];
|
|
let slides = carousel.getElementsByClassName("carousel__slide");
|
|
let nav_items = Array.from(carousel.getElementsByClassName("carousel__navigation-item"))
|
|
let last_scroll_pos = null;
|
|
|
|
viewport.onscroll = (_event) => {
|
|
let position = slides.length * viewport.scrollLeft / viewport.scrollWidth;
|
|
let direction = last_scroll_pos == null || last_scroll_pos < viewport.scrollLeft;
|
|
last_scroll_pos = viewport.scrollLeft;
|
|
|
|
nav_items.forEach((item, index) => {
|
|
if (
|
|
(direction && position > index-1 && position <= index) ||
|
|
(!direction && position >= index && position < index+1)
|
|
) {
|
|
if (!item.classList.contains("enabled")) {
|
|
item.classList.add("enabled")
|
|
}
|
|
return
|
|
}
|
|
if (item.classList.contains("enabled")) {
|
|
item.classList.remove("enabled")
|
|
}
|
|
})
|
|
}
|
|
})
|
|
|