How to Traverse The DOM in JavaScript

How to Traverse The DOM in JavaScript

Learn how to traverse the DOM in JavaScript - A good JavaScript developer needs to know how to traverse the DOM. One node to the other nodes, that is, the way of traversing the DOM traversal and being able to select HTML elements with JavaScript. Top 10 of the must know methods and hopefully this will help you master DOM traversal by the end of the guide.

My top 10 methods in DOM traversal

Intro

One of the most important skills of a web developer is DOM traversal and being able to select HTML elements with JavaScript. This will be a guide on my top 10 of the must know methods and hopefully this will help you master DOM traversal by the end of the guide.

Fair warning!

This is a guide for developers with at least some basic knowledge in HTML & JavaScript

DOM Nodes

Before we dive into the traversal methods, let’s look at the brief explanation of the DOM and Node Relationships from  W3school.

According to the W3C HTML DOM standard, everything in an HTML document is a node:

-HTML node tree

  • The entire document is a document node
  • Every HTML element is an element node
  • The text inside HTML elements are text nodes
  • All comments are comment nodes

Node Relationships

The nodes in the node tree have a hierarchical relationship to each other. The terms parent, child, and sibling are used to describe the relationships.

  • In a node tree, the top node is called the root (or root node)
  • Every node has exactly one parent, except the root (which has no parent)
  • A node can have a number of children
  • Siblings (brothers or sisters) are nodes with the same parent

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