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HTML <h1>Hello World!</h1> <button class = "btn" onclick = "myFunction()"> Click me </button> CSS h1{ color: #f13b3b; } .btn{ padding: 10px 20px; } JS function myFunction(){ alert("Welcome"); } ...

Tutorial JavaScript : Menambahkan dan Menghapus Attribut Class Pada Tag HTML dengan JavaScript

HTML <h1>Hello World!</h1> <button class = "btn" onclick = "myFunction()"> Click me </button> CSS h1{ color: #f13b3b; } .btn{ padding: 10px 20px; } JS function myFunction(){ alert("Welcome"); } ...