SELF-Treffen in Mannheim 2025

SELFHTML wird 30 Jahre alt!
Die Mitgliederversammlung findet am 24.05.2025 um 10:00 statt. Alle Mitglieder und Interessierte sind herzlich eingeladen.
Davor und danach gibt es Gelegenheiten zum gemütlichen Beisammensein. → Veranstaltungs-Ankündigung.

Beispiel:Memo-Card-2.html

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<!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">
  <title>Memo-Quiz - 2</title>
  <style>

#gameboard {
  display: grid;
  gap: 1em;
	grid-template-columns: repeat(4, 1fr);
	width: 40em;
}

#gameboard button {
  width: 8em;
  aspect-ratio: 1 / 1;
  perspective: 500px;
  background: transparent;
  border: 0;
  padding: 0;
}

img {
  max-width: 100%;
  display: block; 
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.6s;
  transform-style: preserve-3d;
}

ul {
  text-align: start;
}

.flip-card[aria-selected="true"] .flip-card-inner {
  transform: rotateY(180deg);
}

.flip-card-front,
.flip-card-back {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: thin solid black;
  backface-visibility: hidden;
}

.flip-card-front {
  background-color: #e6f2f7;
  transform: rotateY(180deg);
}

.flip-card-front img {
  width: 100%;
  height: auto;
  background-color: #fff;
  display: block;
}

.flip-card-back {
  background: white url(https://wiki.selfhtml.org/images/4/45/SELF-Logo.svg);
  background-size: contain; 
  background-repeat: no-repeat;
  background-position: center; 
}



</style>
	  

</head>
 
<body>
  <h1>Memo-Quiz - noch ohne Funktion!</h1>
  
  <p id="hint">Wähle zwei Karten aus und prüfe, ob sie ein Set sind.</p> 
  
  <div id="gameboard">
  	<img src="https://wiki.selfhtml.org/images/f/fd/Snowman.svg" alt="snowman">
  	<img src="https://wiki.selfhtml.org/images/9/90/Advent-candles-4.svg" alt="candles">  
    <img src="https://wiki.selfhtml.org/images/0/01/Selfhtml-logo-Weihnachten.png" alt="SELF-Logo mit Nikloausmütze, ca 2008">
    <img src="https://wiki.selfhtml.org/images/5/59/Selfangel.jpg" alt="SELF-Mitglied als Weihnachtsengel, ca 2008">    
  </div>    
  
  

<script>
document.addEventListener("DOMContentLoaded", () => {
  const gameboard = document.querySelector("#gameboard");
  const images = Array.from(gameboard.querySelectorAll("img"));

  images.forEach((img) => {
    for (let i = 0; i < 2; i++) {
      const button = document.createElement("button");
      button.classList.add("flip-card");
      button.setAttribute("aria-selected", "false");

      button.addEventListener("click", () => {
        const isSelected = button.getAttribute("aria-selected") === "true";
        button.setAttribute("aria-selected", isSelected ? "false" : "true");
      });

      const flipCardInner = document.createElement("div");
      flipCardInner.classList.add("flip-card-inner");

      const flipCardFront = document.createElement("img");
      flipCardFront.classList.add("flip-card-front");
      flipCardFront.src = img.src;
      flipCardFront.alt = img.alt;

      const flipCardBack = document.createElement("div");
      flipCardBack.classList.add("flip-card-back");

      flipCardInner.appendChild(flipCardFront);
      flipCardInner.appendChild(flipCardBack);
      button.appendChild(flipCardInner);

      gameboard.appendChild(button);
    }

    img.remove();
  });
});
</script>

</body>
</html>