What is an iframe

The full name of iframe is Inline Frame, which is an HTML element used to embed other web pages or documents in web pages. It can create an independent window to display the content of other web pages, so that users can browse multiple web pages at the same time on the same page. It can create a scrollable rectangular area in a web page to display the content of other web pages.

The operating environment of this tutorial: Windows 10 system, Dell G3 computer.

iframe is an HTML element used to embed other web pages or documents in a web page. It can create an independent window to display the content of other web pages, so that users can browse multiple web pages at the same time on the same page. The full name of iframe is Inline Frame, which can create a scrollable rectangular area in a web page to display the content of other web pages.

The syntax of the iframe box is as follows:

<iframe src="URL" width="width" height="height"></iframe>

Among them, the 'src) attribute specifies the URL of the web page to be embedded, and the width and 'height attributes specify the width and height of the iframe box. By adjusting the values ​​of these properties, you can control the size of the iframe.

The advantage of using an iframe is that you can embed the content of other web pages into the current web page, thereby achieving dynamic updating and interaction of the web page. For example, you can embed an iframe on the home page of a news website to display the latest news content. When the news content changes, only the embedded web page needs to be updated, without modifying the code of the homepage.

In addition, iframe boxes can also be used to embed other types of documents, such as PDF files, videos, audios, etc. By using the appropriate plugin or embed code, the content of these documents can be displayed in an iframe.

However, there are also some problems with using iframie boxes. First, since the iframe is an independent window, it creates a new browsing context, which means that the web page in the iframe cannot communicate directly with the parent page. Secondly, embedded web pages may affect the performance and loading speed of the parent page, especially when the embedded web page contains a large amount of content or complex scripts.

In order to solve these problems, some techniques can be used to improve the use of iframe boxes. For example, you can use the postMessage API to communicate between the iframe and the parent page. In addition, lazy loading technology can be used to delay loading of embedded web pages to improve page loading speed.

In summary, an iframe is an HTML element used to embed other web pages or documents in a web page. It can realize dynamic updating and interaction of web pages, but there are also some problems that need to be paid attention to. Through the reasonable use of iframes and related technologies, the user experience and performance of web pages can be improved.

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