EB5AN Visão geral e história

document.addEventListener('DOMContentLoaded', function () { const wrapper = document.querySelector('.program-information'); if (!wrapper) return; const sideBox = wrapper.querySelector('.info-side-box'); if (!sideBox) return; const headerOffset = 120; function getNumberFromClass(el, prefix) { const classList = Array.from(el.classList); const match = classList.find(cls => cls.startsWith(prefix)); return match ? match.replace(prefix, '') : null; } const sideItems = Array.from(sideBox.querySelectorAll('[class*="info-side-"]')).filter(el => { return Array.from(el.classList).some(cls => /^info-side-\d+$/.test(cls)); }); const blockItems = Array.from(wrapper.querySelectorAll('[class*="info-block-"]')).filter(el => { return Array.from(el.classList).some(cls => /^info-block-\d+$/.test(cls)); }); const pairs = {}; sideItems.forEach(sideItem => { const num = getNumberFromClass(sideItem, 'info-side-'); if (!num) return; pairs[num] = pairs[num] || {}; pairs[num].side = sideItem; }); blockItems.forEach(blockItem => { const num = getNumberFromClass(blockItem, 'info-block-'); if (!num) return; pairs[num] = pairs[num] || {}; pairs[num].block = blockItem; }); function setActive(num) { Object.keys(pairs).forEach(key => { if (pairs[key].side) { pairs[key].side.classList.toggle('is-active', key === String(num)); } }); if (pairs[num] && pairs[num].side && sideBox) { const activeItem = pairs[num].side; const itemTop = activeItem.offsetTop; const itemHeight = activeItem.offsetHeight; const boxScrollTop = sideBox.scrollTop; const boxHeight = sideBox.clientHeight; if (itemTop boxScrollTop + boxHeight) { sideBox.scrollTo({ top: itemTop - (boxHeight / 2) + (itemHeight / 2), behavior: 'smooth' }); } } } Object.keys(pairs).forEach(num => { const pair = pairs[num]; if (!pair.side || !pair.block) return; pair.side.addEventListener('click', function () { const blockTop = pair.block.getBoundingClientRect().top + window.pageYOffset - headerOffset; window.scrollTo({ top: blockTop, behavior: 'smooth' }); setActive(num); }); }); const visibleMap = new Map(); const observer = new IntersectionObserver((entries) => { entries.forEach(entry => { const num = getNumberFromClass(entry.target, 'info-block-'); if (!num) return; if (entry.isIntersecting) { visibleMap.set(num, entry.intersectionRatio); } else { visibleMap.delete(num); } }); if (visibleMap.size) { let activeNum = null; let highestRatio = 0; visibleMap.forEach((ratio, num) => { if (ratio > highestRatio) { highestRatio = ratio; activeNum = num; } }); if (activeNum) { setActive(activeNum); } } }, { root: null, rootMargin: '-20% 0px -55% 0px', threshold: [0.1, 0.2, 0.35, 0.5, 0.7, 1] }); Object.keys(pairs).forEach(num => { if (pairs[num].block) { observer.observe(pairs[num].block); } }); const firstNum = Object.keys(pairs).sort((a, b) => Number(a) - Number(b))[0]; if (firstNum) { setActive(firstNum); } });