Animations

API

Arrays

Async

Basics

Challenges

Classes

Console

Dates

Debugging

DOM Elements

DOM Methods

DOM Navigation

DOM Properties

Event Listeners

Flow Control

Forms

Functions

Global Functions

JSON

Keywords

Libraries (3rd party)

Math

Modules

Objects

Snippets

String

Types

Widgets

Window Object

JavaScript - Methods

Here's a basic list of Document Object Methods:

Document.anchors Returns all elements that have a name attribute
document.baseURI Returns the absolute base URI of the document
Document.body Returns the <body> element
Document.cookie Returns the document's cookie
Document.doctype Returns the document's doctype
document.documentElement Returns the <html> element
document.documentURI Returns the URI of the document
Document.domain Returns the domain name of the document server
document.getElementById({id}) Find an element by element id
document.getElementById({id}) Find an element by element id
document.getElementsByTagName({tag name}) Returns a List. Find elements by tag name
document.getElementsByClassName({class name}) Returns a List. Find elements by class name
document.images Returns all <img> elements
document.inputEncoding Returns the document's encoding (character set)
document.lastModified Returns the date and time the document was updated
document.scripts Returns all <script> elements
Document.title Returns the <title> element
document.URL Returns the complete URL of the document

https://www.w3schools.com/js/js_htmldom_document.asp