What does iframe do?

The functions of iframe are: 1. It can realize the nesting and interaction of web pages, and provide the simultaneous display of multiple web page contents; 2. It can realize the partial refresh and asynchronous loading of web pages, and improve the loading speed and response performance of web pages. ; 3. It can realize the security isolation of web pages and protect the main page from malicious code.

Operating system for this tutorial: Windows 10 system, Dell G3 computer.

iframe is a tag in HTML used to embed a web page within another web page. Its function is to allow the content of other web pages to be displayed in a web page, thereby realizing the nesting and interaction of web pages.

First of all, iframe can be used to embed the content of other web pages. By inserting an iframe tag into a web page and setting its src attribute to the URL of another web page, you can embed the content of the web page into a specified location in the current web page. This method can display the content of multiple web pages in one web page at the same time, allowing users to easily switch and browse between different web pages.

Secondly, iframe can also be used to achieve partial refresh of web pages. By setting the src attribute of the iframe to a dynamically generated web page, you can refresh only the content in the iframe without refreshing the entire web page. This method can improve the loading speed and user experience of web pages, especially when content needs to be updated frequently, such as online chat rooms, real-time data display, etc.

In addition, iframe can also be used to implement asynchronous loading of web pages. By loading an independent web page in an iframe, data can be processed and loaded in the background to avoid blocking the loading and rendering of the main page. This approach can improve web page responsiveness and user experience, especially when dealing with large amounts of data or complex calculations.

In addition, iframe can also be used to achieve safe isolation of web pages. Since the content in the iframe is loaded and rendered independently, untrusted content can be placed in the iframe to prevent malicious code from attacking the main page. This approach can improve the security and protection of web pages, especially when processing user input or third-party content.

To sum up, iframe has many functions in web development. It can realize the nesting and interaction of web pages, and provide the simultaneous display of multiple web page contents; it can realize partial refresh and asynchronous loading of web pages, improve the loading speed and response performance of web pages; it can also realize the security isolation of web pages and protect the main page from The impact of malicious code. Therefore, mastering and flexibly using iframe tags is very beneficial to improving the functionality and user experience of web pages.

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