1var newDiv = document.createElement("div");
2document.body.appendChild(newDiv);

1document.body.onload = addElement;
2
3function addElement () { 
4  // create a new div element 
5  var newDiv = document.createElement("div"); 
6  // and give it some content 
7  var newContent = document.createTextNode("Hi there and greetings!"); 
8  // add the text node to the newly created div
9  newDiv.appendChild(newContent);  
10
11  // add the newly created element and its content into the DOM 
12  var currentDiv = document.getElementById("div1"); 
13  document.body.insertBefore(newDiv, currentDiv); 
14}

1let element = document.createElement(tagName[, options]);
2

1document.body.onload = addElement;
2
3function addElement () {
4  // create a new div element
5  const newDiv = document.createElement("div");
6
7  // and give it some content
8  const newContent = document.createTextNode("Hi there and greetings!");
9
10  // add the text node to the newly created div
11  newDiv.appendChild(newContent);
12
13  // add the newly created element and its content into the DOM
14  const currentDiv = document.getElementById("div1");
15  document.body.insertBefore(newDiv, currentDiv);
16}
17