HTML elements

An HTML element is a building block of an HTML document. It is used to represent a piece of content on a web page, such as text, images, or videos. Each element is defined by a tag, which is a set of characters enclosed in angle brackets, such as <p>, <img>, or <video>. For example, this is a paragraph element:

<p>This is a paragraph of text.</p>

You can also add attributes to an element to provide additional information or to control how the element behaves. For example, the src attribute is used to specify the source of an image, like this:

<img src="image.jpg" alt="A description of the image">

In modern JavaScript, you can use the DOM (Document Object Model) to interact with elements on a web page. For example, you can use the querySelector() method to select an element by its CSS selector, like this:

const myElement = document.querySelector('#myId');

You can also use getElementById() method to select an element by its id, like this:

const myElement = document.getElementById('myId');

You can also use getElementsByTagName() method to select all elements of a certain type, like this:

const myElements = document.getElementsByTagName('p');

Once you have selected an element, you can use JavaScript to change its content, style, or behavior.

In summary, an HTML element is a building block of a web page, and it is defined by a tag, it can also have attributes which provide additional information or control how the element behaves and in modern JavaScript, you can use the DOM (Document Object Model) to interact with elements on a web page.