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screens/position/allgemeines.html
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screens/position/allgemeines.html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Animationen</title>
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<link rel="stylesheet" href="../../css/layout.css">
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<link rel="stylesheet" href="../../css/position.css">
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</head>
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<body>
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<header>
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<h1>Animationen</h1>
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</header>
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<nav class="navigationbar">
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<a href="../home.html">Home</a>
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<a href="../flexbox/allgemeines.html">Flexbox-Layout</a>
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<a href="../grid/allgemeines.html">Grid-Layout</a>
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<a href="../text_styling/allgemeines.html">Text-Styling</a>
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<a href="../position/allgemeines.html">Position-Eigenschaft</a>
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<a href="../animation/animations.html">Animationen</a>
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</nav>
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<nav class="navigationbar">
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<a href="./">Positionen</a>
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</nav>
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<main>
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<article>
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<section>
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<h2>
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Positionen mit CSS
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</h2>
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<p>
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Mit den verschiedenen Positions-Eigenschaften wird definiert wie sich die Position
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eines Elementes relativ zum Parent-Element verhaelt. Das hat auswirkungen darauf, wie die Eigenschaften
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<code>top</code>, <code>bottom</code>, <code>left</code>, <code>right</code> interpretiert werden.
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Das kann zum Beispiel praktisch sein, wenn man auf einer Website einen fixierten Header setzen moechte.
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</p>
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</section>
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<section class="examples">
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<h3>Static</h3>
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<div class="visual-example" id="example1">
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<div class="example-box">1</div>
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<div class="example-box active">2</div>
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<div class="example-box">3</div>
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<div class="example-box">4</div>
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</div>
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<div class="code-example">
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<code>
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#example1 .active {<br>
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 position: static;<br>
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 top: 1rem;<br>
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 left: 1rem;<br>
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}
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</code>
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</div>
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<p>
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Obwohl die Eigenschaften <code>top</code> und <code>left</code> gesetzt sind, haben diese keine
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Auswirkung, da die Positions-Eigenschaft auf <code>static</code> gesetzt ist.
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</p>
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</section>
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<section class="examples">
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<h3>Relative</h3>
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<div class="visual-example" id="example2">
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<div class="example-box">1</div>
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<div class="example-box active">2</div>
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<div class="example-box">3</div>
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<div class="example-box">4</div>
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</div>
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<div class="code-example">
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<code>
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#example2 .active {<br>
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 position: relative;<br>
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 top: 1rem;<br>
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 left: 1rem;<br>
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}
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</code>
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</div>
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<p>
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Relativ zum normalen Dokument-flow wird das Element mit den Attributen <code>top</code> und
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<code>left</code> verschoben.
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</p>
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</section>
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<section class="examples">
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<h3>Absolute</h3>
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<div class="visual-example" id="example3">
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<div class="example-box">1</div>
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<div class="example-box active">2</div>
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<div class="example-box">3</div>
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<div class="example-box">4</div>
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</div>
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<div class="code-example">
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<code>
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#example3 .active {<br>
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 position: relative;<br>
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 top: 1rem;<br>
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 left: 1rem;<br>
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}
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</code>
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</div>
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<p>
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Das Element wird aus dem normalen Dokument-flow entfernt und absolut zum naechtsen
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Eltern-Elements mit positions-Attribut <code>relative</code>, <code>absolute</code>, <code>fixed</code>
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oder <code>static</code> platziert.
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</p>
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</section>
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<section class="examples">
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<h3>Fixed</h3>
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<div class="visual-example" id="example4">
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<div class="example-box">1</div>
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<div class="example-box active">2</div>
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<div class="example-box">3</div>
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<div class="example-box">4</div>
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</div>
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<div class="code-example">
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<code>
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#example4 .active {<br>
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 position: relative;<br>
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 top: 1rem;<br>
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 left: 1rem;<br>
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}
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</code>
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</div>
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<p>
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Das Element wird aus dem normalen Dokument-flow entfernt und absolut zum viewport positioniert.
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Das Element ist nun oben links auf der Webseite zu finden.
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</p>
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</section>
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<section class="examples">
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<h3>Sticky</h3>
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<div class="visual-example" id="example5">
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<div class="example-box">1</div>
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<div class="wrapper">
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<div class="example-box active">2</div>
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<div class="example-box">3</div>
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</div>
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<div class="example-box">4</div>
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<div class="example-box">5</div>
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<div class="example-box active">6</div>
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<div class="example-box">7</div>
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<div class="example-box">8</div>
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<div class="example-box">9</div>
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<div class="example-box">10</div>
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</div>
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<div class="code-example">
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<code>
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#example5 .active {<br>
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 position: sticky;<br>
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 left: 1rem;<br>
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 right: 1rem;<br>
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}
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</code>
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</div>
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<p>
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Das Element is im normalen Dokument flow-platziert. Sobald das Element allerdings von einem
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uebergeordneten Element mit overflow-Eigenschaft die Kante erreicht, greift die entsprechende
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Eigenschaft <code>top</code>, <code>bottom</code>, <code>left</code> oder <code>right</code>.
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Das Element kann sich dabei nur im direkten Eltern-Element bewegen; Box 2 und Box 3 sind zur
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Veranschaulichung in einem extra div-Element.
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</p>
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</section>
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</article>
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</main>
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<footer>
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<p>Erstellt von: Alban Becker</p>
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</footer>
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</body>
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</html>
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