AoPS Wiki:Sandbox

Shortcut: A:SAND

// Display an alert when the page loads window.onload = function() {

   alert("Page content has loaded!");
   
   // Change the content of a specific element with ID 'example'
   var element = document.getElementById("example");
   if (element) {
       element.innerHTML = "This is dynamically updated content!";
   }
   
   // Add a new button to the page dynamically
   var newButton = document.createElement("button");
   newButton.innerHTML = "Click Me!";
   newButton.onclick = function() {
       alert("Button clicked!");
   };
   document.body.appendChild(newButton);

};