learn javascript dom manipulation tutorial for beginners

javascript dom manipulation tutorial for beginners

the document object model (dom) represents the structure of a web page. through the dom, you can manipulate html elements, change styles, and respond to user events. this tutorial will guide you through the basics of dom manipulation using javascript.

what is the dom?

the dom is an interface that browsers implement to provide a structured representation of the document as a tree of objects. each element in the html document is represented as a node in the tree.

getting started with dom manipulation

to get started, you need to have a basic understanding of html and javascript. here’s a simple html document we’ll use for our examples:

1. selecting elements

before you can manipulate elements, you need to select them. you can use several methods:

- `getelementbyid`: selects an element by its id.
- `getelementsbyclassname`: selects elements by their class name. (returns a live htmlcollection)
- `getelementsbytagname`: selects elements by their tag name. (returns a live htmlcollection)
- `queryselector`: selects the first element that matches a css selector.
- `queryselectorall`: selects all elements that match a css selector. (returns a static nodelist)

example: selecting elements

2. changing element content

you can change the content of selected elements using the `textcontent` or `innerhtml` properties.

example: changing text content

3. changing styles

you can manipulate the css styles directly through the `style` property.

example: changing styles

4. adding and removing elements

you can create new elements and add them to the dom using `createelement`, `appendchild`, and `removechild`.

example: adding an element

example: removing an element

5. event handling

you can make your web pages interactive by responding to user events, such as clicks.

example: adding event listeners

complete example

conclusion ...

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