public/web-development/presentation.git

			@@ -27,14 +27,15 @@
			<h3>Grundlagen</h3>
			<ul>
			<li>HTML/CSS/JS</li>
			<li>JSON</li>
			<li>HTTP-Protokoll</li>
			<li>JSON</li>
			<li>Debugger</li>
			</ul>
			</section>
			<section>
			<h3>Fortgeschrittenes</h3>
			<ul>
			<li>JavaScript</li>
			<li>NodeJS</li>
			<li>Responsive Design</li>
			<li>CSS-Animationen</li>
			@@ -267,7 +268,9 @@
			#my-id /* ID */
			html, body /* Mehrfachselektion */
			div > p /* p die direkt unterhalb eines div sind */
			div p /* p die irgendwo unterhalb eines div sind */
			a:visited /* besuchte Links */
			div:hover /* divs über die man mit der Maus fährt */
			span.important /* span mit der Klasse "important" */
			</code>
			</pre>
			@@ -324,6 +327,28 @@
			display: inline-block;
			width: 20px;
			height: 20px;
			</code>
			</pre>
			</section>
			<section>
			<h3>Spezifität</h3>
			<p>Regeln können andere Regeln überschreiben</p>
			<pre>
			<code class="html" data-trim data-line-numbers>
			<script type="text/template">
			<div style="display: inline-block"></div>
			</script>
			</code>
			</pre>
			<pre>
			<code class="css" data-trim data-line-numbers>
			#id:hover { display: none }

			#id { display: block }

			.class.clazz { display: inline }

			div { display: inline-block }
			</code>
			</pre>
			</section>
			@@ -404,6 +429,274 @@
			</code>
			</pre>
			</section>
			<section>
			<h3>Beispiel Menü</h3>
			<iframe data-src="/assets/html/css-menu.html"></iframe>
			</section>
			<section>
			<pre>
			<code class="css" data-trim data-line-numbers>
			.menu-item {
			display: inline-block;

			position: relative;
			}

			.menu-item .children {
			display: none;

			position: absolute;
			}

			.menu-item:hover .children {
			display: block;
			}
			</code>
			</pre>
			</section>
			<section>
			<pre>
			<code class="html" data-trim data-line-numbers>
			<script type="text/template">
			<div class="menu">
			<div class="menu-item">Eins</div>
			<div class="menu-item">
			Hover Me!
			<div class="children">
			<div>Item 1</div>
			<div>Item 2</div>
			</div>
			</div>
			<div class="menu-item">Drei</div>
			</div>
			</script>
			</code>
			</pre>
			</section>
			</section>
			<section>
			<section>
			<h2>JS</h2>
			</section>
			<section>
			<ul>
			<li>JavaScript stammt aus dem Jahr 1995 von Netscape</li>
			<li>Syntaktisch an Java angelehnt</li>
			<li>Ursprünglich nur optionale, verzichtbare Effekte (unobstrusive)</li>
			<li>Mittlerweile von ECMA standardisiert</li>
			</ul>
			</section>
			<section>
			<table>
			<tr><th>Version</th><th>ECMA Standard</th><th>Jahr</th></tr>
			<tr><td>ES1</td><td>ECMAScript 1</td><td>1997</td></tr>
			<tr><td>ES2</td><td>ECMAScript 2</td><td>1998</td></tr>
			<tr><td><strong>ES3</strong></td><td><strong>ECMAScript 3</strong></td><td><strong>1999</strong></td></tr>
			<tr><td><strong>ES5</strong></td><td><strong>ECMAScript 5</strong></td><td><strong>2009</strong></td></tr>
			<tr><td>ES6</td><td>ECMAScript 2015</td><td>2015</td></tr>
			<tr><td></td><td>...</td><td></td></tr>
			<tr><td></td><td>ECMAScript 2020</td><td>2020</td></tr>
			</table>
			</section>
			<section>
			<p>Code wird zwischen <code>script</code>-Tags geschrieben</p>
			<pre>
			<code class="html" data-trim data-line-numbers>
			<!DOCTYPE html>
			<html lang="de">
			<head>
			<meta charset="UTF-8">
			</head>
			<body>
			<script>// code</script>
			</body>
			</html>
			</code>
			</pre>
			</section>
			<section>
			<p>DOM-API</p>
			<pre>
			<code class="js" data-trim data-line-numbers>
			// findet das erste Element
			const parent = document.querySelector("#id");

			// findet alle Elemente
			const elements = document.querySelectorAll("#id");

			// Element erstellen
			const newElement = document.createElement("div");

			newElement.addEventListener("click", (event) => {
			// Click-Event
			});

			// Element anhängen
			parent.appendChild(newElement);

			newElement.remove();
			</code>
			</pre>
			</section>
			</section>
			<section>
			<section>
			<h2>Auslagern in verschiedene Dateien</h2>
			</section>
			<section>
			<pre>
			<code class="html" data-trim data-line-numbers>
			<!DOCTYPE html>
			<html>
			<head>
			<!-- CSS -->
			<link href="styles.css" rel="stylesheet">
			</head>
			<body>
			<!-- JS -->
			<script src="index.js"></script>
			</body>
			</html>
			</code>
			</pre>
			</section>
			<section>
			<p>Parsen eines HTML-Dokuments</p>
			<pre>
			<code class="html" data-trim data-line-numbers="1\|2\|3\|4\|5\|6\|7\|8\|9\|10">
			<script type="text/template">
			<!DOCTYPE html>
			<html lang="de">
			<head>
			<meta charset="UTF-8">
			<title>Coole Seite 😀</title>
			</head>
			<body>
			<div>Ganz langer Text</div>
			</body>
			</html>
			</script>
			</code>
			</pre>
			</section>
			<section>
			<p>Verschiedene Varianten, JavaScript erst am Ende auszuführen</p>
			<p>Damals mit jQuery:</p>
			<pre>
			<code class="html" data-trim data-line-numbers>
			<!DOCTYPE html>
			<html>
			<head>
			<script>
			$(document).ready((event) => {
			const element = document.querySelector("#hello");
			});
			</script>
			</head>
			<body>
			<div id="hello">Hello World!</div>
			</body>
			</html>
			</code>
			</pre>
			</section>
			<section>
			<p><code>script</code>-Tag am Ende</p>
			<pre>
			<code class="html" data-trim data-line-numbers>
			<!DOCTYPE html>
			<html>
			<head>
			</head>
			<body>
			<div>Hello World!</div>
			...
			<script src="index.js"></script>
			</body>
			</html>
			</code>
			</pre>
			</section>
			<section>
			<p>Event-basiert, z.B. per DOMContentLoaded</p>
			<pre>
			<code class="html" data-trim data-line-numbers>
			<!DOCTYPE html>
			<html>
			<head>
			<script>
			document.addEventListener("DOMContentLoaded", (event) => {
			// wird ausgeführt, sobald das Dokument geparst wurde
			const element = document.querySelector("#hello");
			});
			</script>
			</head>
			<body>
			<div id="hello">Hello World!</div>
			</body>
			</html>
			</code>
			</pre>
			</section>
			<section>
			<p>Moderne Variante</p>
			<pre>
			<code class="html" data-trim data-line-numbers>
			<script src="index.js" defer></script>
			</code>
			</pre>
			</section>
			<section>
			<h2><code>document</code>-Operationen</h2>
			<pre>
			<code class="js" data-trim data-line-numbers>
			document.open();
			document.write("<div>Booo!</div>");
			document.close();
			</code>
			</pre>
			</section>
			<section>
			<a href="https://developer.mozilla.org/en-US/docs/Web/API/Document/write">
			<img data-src="/assets/images/document.write.jpg">
			</a>
			</section>
			<section>
			<pre>
			<code class="html" data-trim data-line-numbers>
			<body>
			<script>document.write("<p>Dies ist ein Text.</p>")</script>
			<button>Dunkle Magie</button>
			<script>
			const button = document.querySelector("button");

			button.addEventListener("click", () => {
			document.write("Und pfutsch!");
			});
			</script>
			</body>
			</code>
			</pre>
			</section>
			</section>
			<section>
			<section>
			<h2>HTTP-Protokoll</h2>
			</section>
			<section>
			<img data-src="/assets/images/osi-model.jpg">
			</section>
			<section>
			<ul>
			<li>Befindet sich auf den OSI-Schichten 5, 6 und 7</li>
			<li>Basiert auf dem Anfrage-Antwort-Prinzip</li>
			<li>Basiert auf reinem Text</li>
			</ul>
			</section>
			<section>
			<p><code>npm install http-server</code></p>
			<p><code>npx http-server --port 3000</code></p>
			</section>
			</section>
			</div>
			</div>