1-) JS - Dinamik özellik oluşturma class , style , src , vs….
<html><head> <title></title> <meta charset="utf-8" /> <style> .kirmizi { color:red; background-color:yellow; } </style></head><body> <div id="anakisim"> <p> Paragraf1</p> <p> Paragraf2</p> <p> Paragraf3</p> </div> <button id="b1" onclick="ozellikEkle()">Ekle</button> <script> var index = 0; function ozellikEkle() { var ozellik = document.createAttribute("class"); ozellik.value = "kirmizi"; var element = document.getElementsByTagName("p"); element[0].setAttributeNode(ozellik); } </script></body></html>