97 lines
3.4 KiB
JavaScript
97 lines
3.4 KiB
JavaScript
function isElementInViewport (el) {
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var rect = el.getBoundingClientRect();
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return (
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rect.top >= 0 &&
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rect.left >= 0 &&
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rect.bottom <= (window.innerHeight || document.documentElement.clientHeight) && /* or $(window).height() */
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rect.right <= (window.innerWidth || document.documentElement.clientWidth) /* or $(window).width() */
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);
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}
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//
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// little addon to enhance the carousel
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var carousels = document.querySelectorAll('.carousel');
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// first addon to change "enabled" slide indicator (way to complicated)
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Array.from(carousels).forEach((carousel) => {
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let viewport = carousel.getElementsByClassName("carousel__viewport")[0];
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let slides = carousel.getElementsByClassName("carousel__slide");
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let nav_items = Array.from(carousel.getElementsByClassName("carousel__navigation-item"))
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let last_scroll_pos = null;
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viewport.onscroll = (_event) => {
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let position = Math.ceil(slides.length * viewport.scrollLeft / viewport.scrollWidth);
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let direction = last_scroll_pos == null || last_scroll_pos < viewport.scrollLeft;
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console.log("direction", direction);
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console.log("position", position);
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last_scroll_pos = viewport.scrollLeft;
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nav_items.forEach((item, index) => {
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if (
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(direction && position > index-1 && position <= index) ||
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(!direction && position >= index && position < index+1)
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) {
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if (!item.classList.contains("enabled")) {
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item.classList.add("enabled")
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}
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return
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}
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if (item.classList.contains("enabled")) {
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item.classList.remove("enabled")
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}
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})
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}
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})
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// second addon to replace the anchor with javascript managed jump scroll
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// Iterate through each 'carousel__viewport' element
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carousels.forEach(function(carousel) {
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var viewport = carousel.querySelector('.carousel__viewport')
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// Get all elements with the class 'carousel__slide' within the current 'carousel__viewport'
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var slides = viewport.querySelectorAll('.carousel__slide');
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var prevButtons = viewport.querySelectorAll('.carousel__prev');
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var nextButtons = viewport.querySelectorAll('.carousel__next');
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var navigationButtons = carousel.querySelectorAll('.carousel__navigation-button');
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console.log(prevButtons)
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console.log(navigationButtons)
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prevButtons.forEach(function(prevButton, index) {
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// remove href, for css only carousel
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prevButton.removeAttribute('href');
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prevButton.addEventListener('click', function() {
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console.log("Click of previous", index)
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if (index == 0) {
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viewport.scrollLeft = slides.length * slides[0].offsetWidth;
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return;
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}
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viewport.scrollLeft -= slides[0].offsetWidth;
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});
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});
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nextButtons.forEach(function(nextButton, index) {
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nextButton.removeAttribute('href');
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nextButton.addEventListener('click', function() {
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if (index == slides.length-1) {
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viewport.scrollLeft = 0;
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return;
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}
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viewport.scrollLeft += slides[0].offsetWidth;
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});
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});
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navigationButtons.forEach(function(btn, index) {
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btn.removeAttribute('href');
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btn.addEventListener('click', function() {
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viewport.scrollLeft = slides[0].offsetWidth * index;
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});
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});
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});
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