The document Object

• The document object is your door into accessing DOM objects
• Has a number of useful properties and methods for accessing elements
• document.getElementById() - Gets an element with a particular id attribute
• document.getElementsByClassName() - Gets all elements with a particular class attribute
• document.querySelector() - Gets the first element with a CSS selector

// <h1 id="my-heading">This is a heading</h1>
const heading = document.getElementById("my-heading");
heading.textContent = "New heading text";