An iframe, which stands for "inline frame", is an HTML element that allows you to embed another HTML document within the current one. It is defined by the <iframe> tag and creates a nested browsing context, essentially a webpage within a webpage. This can be particularly useful for inserting content like videos, maps, or advertisements from other sources into your webpage without having to load a new page[1][2][5][6][8][11][13][17][19].
width and height: Define the size of the iframe in pixels or percentages.
When a web browser encounters an iframe tag, it loads the content specified in the src attribute and displays it within the boundaries set by the width and height attributes. The content within an iframe is independent of the parent page's content, meaning it has its own document object model (DOM), and its CSS and JavaScript are isolated from the parent[2][5][8].
However, there are some considerations to keep in mind when using iframes:
Performance: Each iframe can increase the loading time of your webpage because it loads a separate document[8].
Security: Content from untrusted sources can pose security risks, so it's important to only embed content from reliable sources[2][5].
SEO: Content within an iframe may not be indexed by search engines in the same way as content directly on the page, which can affect SEO[5].
