SELF-Treffen in Mannheim 2025
SELFHTML wird 30 Jahre alt! → Veranstaltungs-Ankündigung.
Beispiel:JS-classlist.toggle-v2.html
Aus SELFHTML-Wiki
<!DOCTYPE html>
<html lang="de">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" media="screen" href="./Beispiel:SELFHTML-Beispiel-Grundlayout.css" />
<script>
document.addEventListener('DOMContentLoaded', function () {
function setButtonText(button, container) {
button.textContent = container.classList.contains('closed') ?
button.dataset.closedText :
button.dataset.openedText
}
function toggleReadmoreElement(event) {
const toggleButton = event.target.closest("button");
if (!toggleButton || !toggleButton.classList.contains("readmore-toggle"))
return;
const toggleContainer = toggleButton.closest(".readmore-container");
if (!toggleContainer)
return;
toggleContainer.classList.toggle('closed');
setButtonText(toggleButton, toggleContainer);
}
document.querySelector("main")
.addEventListener("click", toggleReadmoreElement);
for (let toggleContainer of document.querySelectorAll(".readmore-container")) {
let toggleButton = toggleContainer.querySelector(".readmore-toggle");
if (toggleButton)
setButtonText(toggleButton, toggleContainer);
}
});
</script>
<style>
main {
display: flex;
flex-flow: row wrap;
}
#tipp {
flex: 1 1 100%;
height: 1.5em;
}
section, aside {
flex: 2 1 0;
padding: 1em;
margin: 1em;
background-color: #f1f3f4;
border: 2px dotted #adadad;
height: 30em;
transition: height 1s ease-in-out;
}
.readmore-container.closed {
transition: height 1s ease-in-out;
height: 6em;
overflow: hidden;
}
</style>
<title>Beispiel: element.ClassList - 4</title>
</head>
<body>
<h1>Beispiel: Element.classList.toggle</h1>
<main>
<p id="tipp">Wollen Sie mehr lesen? Dann klicken Sie auf den Button.</p>
<section id="aktuelles" class="readmore-container">
<h2>Aktuelles</h2>
<button class="readmore-toggle" data-closed-text="mehr..." data-opened-text="weniger..."></button>
</section>
<section id="ueber" class="readmore-container closed">
<h2>Über uns</h2>
<button class="readmore-toggle" data-closed-text="mehr..." data-opened-text="weniger..."></button>
</section>
<aside id="links">
<h2>Links</h2>
</aside>
</main>
</body>
</html>
