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<!DOCTYPE html>
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<html lang="fr">
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<head>
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<title>template ZONES</title>
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<meta name="description" content="PROTO">
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<meta charset="utf-8">
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<link rel="preload" as="font" type="../font/woff2" href="fonts/Fonte-Texte.woff2" crossorigin />
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<link rel="preload" as="font" type="../font/woff2" href="fonts/Fonte-Titre.woff2" crossorigin />
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<link rel="stylesheet" type="text/css" href="zones.css">
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</head>
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<body>
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<section id="header">HEADER</section>
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<section id="navbar">NAVBAR</section>
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<section id="synthese">SYNTHESE</section>
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<section id="principale">PRINCIPALE</section>
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<section id="footer">FOOTER</section>
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</body>
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<template id="zone">
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<div id="div_before_zone"></div>
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<div id="div_zone">zone</div>
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<div id="div_after_zone"></div>
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</template>
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<script src="zones.js"></script>
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<script>
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function addClassToElement(id,className){
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const element=document.querySelector(id);
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if (element) element.classList.add(className);
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}
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function removeClassToElement(id,className){
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const element=document.querySelector(id);
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if (element) element.classList.remove(className);
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}
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function initZoneElements(zone) {
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const element=document.querySelector('#div_'+zone);
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if (element) {
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element.innerHTML=zone;
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addClassToElement('#div_before_'+zone,'div_before_section');
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addClassToElement('#div_'+zone,'div_section');
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addClassToElement('#div_after_'+zone,'div_after_section');
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}
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}
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function initZone(zone) {
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const sectionZone = document.querySelector('#'+zone);
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if (sectionZone) {
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const template = document.querySelector('#zone');
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if (template) {
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const contenu = document.importNode(template.content, true);
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if (contenu) {
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sectionZone.innerHTML='';
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contenu.childNodes.forEach((element) => {if (element.id) element.id=element.id.replace('zone',zone)});
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sectionZone.appendChild(contenu);
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initZoneElements(zone);
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}
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}
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}
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}
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initZone('header');
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initZone('navbar');
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initZone('synthese');
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initZone('principale');
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initZone('footer');
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addClassToElement('#div_header','header');
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addClassToElement('#div_navbar','navbar');
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addClassToElement('#div_synthese','synthese');
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addClassToElement('#div_principale','principale');
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addClassToElement('#div_footer','footer');
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const section_navbar=document.querySelector('#div_navbar');
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const section_synthese=document.querySelector('#div_synthese');
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const after_section_synthese=document.querySelector('#div_after_synthese');
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function scrollToElement(elementSelector) {
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const element = document.querySelector(elementSelector);
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if (element) {
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element.scrollIntoView();
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logMsg('HtmlElement','scrollTo '+elementSelector);
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}
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}
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function etatSections(etat) {
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switch (etat) {
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case 1 :
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scrollToElement('#div_before_header');
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section_synthese.style.display = "block";
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removeClassToElement('#div_navbar','navbar_fixed');
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removeClassToElement('#div_before_synthese','div_before_synthese_when_navbar_fixed');
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break;
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case 2 :
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scrollToElement('#div_before_navbar');
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section_synthese.style.display = "block";
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addClassToElement('#div_navbar','navbar_fixed');
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addClassToElement('#div_before_synthese','div_before_synthese_when_navbar_fixed');
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break;
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case 3 :
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scrollToElement('#div_before_navbar');
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section_synthese.style.display = "none";
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addClassToElement('#div_navbar','navbar_fixed');
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addClassToElement('#div_before_synthese','div_before_synthese_when_navbar_fixed');
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break;
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}
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}
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after_section_synthese.addEventListener("click", function() {
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if (section_synthese.style.display === "block") {
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etatSections(3);
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} else {
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etatSections(2);
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}
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});
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function beforeHeaderVisibility(_visible) {
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intersectionObserverLog('TRIGGER '+arguments.callee.name);
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if (!_visible) {
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etatSections(2);
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}
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}
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function afterHeaderVisibility(_visible) {
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intersectionObserverLog('TRIGGER '+arguments.callee.name);
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if (_visible) {
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etatSections(1);
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}
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}
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addIntersectionObserverEntry("div_before_header", beforeHeaderVisibility);
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addIntersectionObserverEntry("div_after_header", afterHeaderVisibility);
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function beforeNavbarVisibility(_visible) {
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intersectionObserverLog('TRIGGER '+arguments.callee.name);
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if (!_visible) {
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etatSections(3);
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}
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}
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function afterNavbarVisibility(_visible) {
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intersectionObserverLog('TRIGGER '+arguments.callee.name);
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if (_visible) {
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etatSections(3);
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}
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}
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addIntersectionObserverEntry("div_before_navbar", beforeNavbarVisibility);
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//addIntersectionObserverEntry("div_after_navbar", afterNavbarVisibility);
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let yprev = window.pageYOffset;
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const scrollHandler = () => {
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const y = window.pageYOffset;
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const ymax = document.documentElement.scrollHeight - window.innerHeight;
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if (y > yprev) {
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if (section_header.style.display !== "none") {
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section_header.style.display="none";
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} else {
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if (section_synthese.style.display !== "none") {
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section_synthese.style.display="none";
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}
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}
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} else {
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if (y < yprev) {
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if (section_synthese.style.display !== "block") {
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section_synthese.style.display="block";
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} else {
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if (section_header.style.display !== "block") {
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section_header.style.display="block";
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}
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}
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}
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}
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yprev = Math.min(Math.max(y, 0), ymax);
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};
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const throttleCallback = (callback, timeout) => {
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let wait = false;
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return () => {
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if (wait) return;
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callback.call();
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wait = true;
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setTimeout(() => { wait = false; }, timeout);
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};
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};
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// window.addEventListener('scroll', throttleCallback(scrollHandler, 250));
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</script>
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</html>
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