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script.js
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script.js
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const header = document.getElementById('header');
const scrollElements = document.querySelectorAll('.js-scroll');
const scrollCircleElements = document.querySelectorAll('.circle');
var scrollPos = 0;
let detect = undefined;
const inViewport = (el, divided = 1) =>{
const elementTop = el.getBoundingClientRect().top;
return (elementTop <= (window.innerHeight || document.documentElement.clientHeight) / divided);
};
const outOfViewport = (el) => {
const elementTop = el.getBoundingClientRect().top;
return (
elementTop > (window.innerHeight || document.documentElement.clientHeight)
);
};
const displayElement = (element) => {
element.classList.add('scrolled');
}
const hideElement = (element) => {
element.classList.remove('scrolled');
};
const handleScrollAnimation = () => {
scrollElements.forEach((el) => {
if (inViewport(el,1.25)) {
displayElement(el);
} else if (outOfViewport(el)) {
hideElement(el);
}
});
scrollCircleElements.forEach((el) => {
if (inViewport(el,1.25)) {
if (detect === 'true') {
el.classList.add('animate-circle' ,'slide-top');
}
else{
el.classList.add('animate-circle' ,'slide-back');
}
}
else if (outOfViewport(el)) {
if (detect === 'true') {
el.classList.remove('animate-circle' ,'slide-top');
}
else{
el.classList.remove('animate-circle' ,'slide-back');
}
}
});
}
function detectScroll() {
scrollCircleElements.forEach((el) => {
if ((document.body.getBoundingClientRect()).top > scrollPos) {
detect = true;
el.classList.add('animate-circle' ,'slide-top');
el.classList.remove('slide-back');
}
else {
detect = false;
el.classList.add('animate-circle' ,'slide-back');
el.classList.remove('slide-top');
el.style.top = el.getBoundingClientRect.top;
el.style.left = el.getBoundingClientRect.left;
el.style.bottom = el.getBoundingClientRect.bottom;
el.style.right = el.getBoundingClientRect.right;
}
});
scrollPos = (document.body.getBoundingClientRect()).top;
}
function changeHeader() {
if (document.body.scrollTop > 50 || document.documentElement.scrollTop > 50) {
header.classList.add('sticky-head');
}
else{
header.classList.remove('sticky-head');
}
}
window.addEventListener('scroll',() =>{
changeHeader();
handleScrollAnimation();
detectScroll();
});
// ------------------------menu-toggle--------------------
const menuIcon = document.getElementById('menu-icon');
const menu = document.querySelector(".menu");
menuIcon.addEventListener('click',() =>{
menu.classList.toggle('show');
menuIcon.classList.toggle('hide');
});