window.document get elementbyid code example

Example 1: document.getelementbyid() javascript

var x = document.getElementById("demo");   // Get the element with id="demo"
x.style.color = "red";                     // Change the color of the element

Example 2: document.getElementById

function changeColor(newColor) {
  var elem = document.getElementById('para');
  elem.style.background-color = newColor;
}