What do people mean by "DOM Manipulation" and how would I do that?

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I always hear people talk about DOM this, manipulate the DOM, change the DOM, traverse the DOM; but what exactly does this mean?

What is the DOM and why would I want to do something with it?

dom html
4 Answers

In short:

When a web page is loaded, the browser creates a Document Object Model of the page, which is an object oriented representation of an HTML document, that acts as an interface between JavaScript and the document itself and allows the creation of dynamic web pages.

Source: w3schools - HTML DOM

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