77 lines
2.0 KiB
JavaScript
Executable File
77 lines
2.0 KiB
JavaScript
Executable File
(function () {
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"use strict";
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const revealEl = document.querySelectorAll("[class*=reveal-]");
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let viewportHeight = window.innerHeight;
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function throttle(delay, fn) {
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var lastCall = 0;
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return function () {
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var now = new Date().getTime();
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if (now - lastCall < delay) {
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return;
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}
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lastCall = now;
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return fn.apply(void 0, arguments);
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};
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}
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function elementIsVisible(el, offset) {
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return el.getBoundingClientRect().top <= viewportHeight - offset;
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}
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function revealElements() {
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for (let i = 0; i < revealEl.length; i++) {
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let el = revealEl[i];
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let revealDelay = el.getAttribute("data-reveal-delay");
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let revealOffset = el.getAttribute("data-reveal-offset")
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? el.getAttribute("data-reveal-offset")
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: "200";
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let listenedEl = el.getAttribute("data-reveal-container")
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? el.closest(el.getAttribute("data-reveal-container"))
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: el;
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if (
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elementIsVisible(listenedEl, revealOffset) &&
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!el.classList.contains("is-revealed")
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) {
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if (revealDelay && revealDelay !== 0) {
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setTimeout(function () {
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el.classList.add("is-revealed");
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}, revealDelay);
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} else {
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el.classList.add("is-revealed");
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}
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}
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}
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revealDone();
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}
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function revealScroll() {
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throttle(30, revealElements());
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}
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function revealResize() {
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viewportHeight = window.innerHeight;
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throttle(30, revealElements());
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}
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function revealDone() {
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if (
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revealEl.length >
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document.querySelectorAll("[class*=reveal-].is-revealed").length
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)
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return;
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window.removeEventListener("load", revealElements);
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window.removeEventListener("scroll", revealScroll);
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window.removeEventListener("resize", revealResize);
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}
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if (
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revealEl.length > 0 &&
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document.body.classList.contains("has-animations")
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) {
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window.addEventListener("load", revealElements);
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window.addEventListener("scroll", revealScroll);
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window.addEventListener("resize", revealResize);
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}
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})();
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