The <iframe> element in HTML is used to embed another HTML document within the current one. This creates a nested browsing context, which essentially means you can display a webpage within a webpage. The <iframe> tag is versatile and can be used to include a variety of content, such as videos, maps, or even entire web pages.

Basic Usage of <iframe>

To embed content using an <iframe>, you need to specify the src attribute, which contains the URL of the document you want to embed. Here's a simple example:

This code will create an inline frame displaying the content from "https://www.example.com". It's also good practice to include a title attribute to describe the content of the <iframe>, which aids accessibility by providing a label for screen readers.

Attributes and Styling

The <iframe> element can be customized with various attributes to control its behavior and appearance. Some of the key attributes include:

• width and height: Set the size of the <iframe>. If not specified, the default width is 300 pixels, and the default height is 150 pixels.

• loading: Can be set to "lazy" to defer loading the <iframe> until it's about to enter the viewport, which can improve page load performance.

• sandbox: Applies extra restrictions to the content in the <iframe>, such as disallowing scripts or form submissions.

• allowfullscreen: Allows the <iframe> to be displayed in fullscreen mode.