mathurhimika/biotech-horizon-explorer
0
1document.addEventListener('DOMContentLoaded', function() {2 // Back to top button3 const backToTopButton = document.getElementById('backToTop');4 5 window.addEventListener('scroll', function() {6 if (window.pageYOffset > 300) {7 backToTopButton.classList.remove('opacity-0', 'invisible');8 backToTopButton.classList.add('opacity-100', 'visible');9 } else {10 backToTopButton.classList.remove('opacity-100', 'visible');11 backToTopButton.classList.add('opacity-0', 'invisible');12 }13 });14 15 backToTopButton.addEventListener('click', function() {16 window.scrollTo({17 top: 0,18 behavior: 'smooth'19 });20 });21 22 // Add animation classes to elements when they come into view23 const animateOnScroll = function() {24 const elements = document.querySelectorAll('.fade-in');25 26 elements.forEach(element => {27 const elementPosition = element.getBoundingClientRect().top;28 const windowHeight = window.innerHeight;29 30 if (elementPosition < windowHeight - 100) {31 element.classList.add('animate-fadeIn');32 }33 });34 };35 36 window.addEventListener('scroll', animateOnScroll);37 animateOnScroll(); // Trigger on load for elements already in view38 39 // Smooth scroll for anchor links40 document.querySelectorAll('a[href^="#"]').forEach(anchor => {41 anchor.addEventListener('click', function(e) {42 e.preventDefault();43 44 const targetId = this.getAttribute('href');45 if (targetId === '#') return;46 47 const targetElement = document.querySelector(targetId);48 if (targetElement) {49 window.scrollTo({50 top: targetElement.offsetTop - 80,51 behavior: 'smooth'52 });53 }54 });55 });56 57 // Feather icons replacement58 feather.replace();59});