Homologous iframe means iframe elements nested between different web pages under the same domain name. By using homologous iframes, communication and interaction between different source webpages can be achieved. When a webpage is embedded in another webpage through an iframe, the embedded webpage is considered to be of the same origin and can communicate and interact freely with the parent webpage. Including reading and modifying the content of the parent web page. When using same-origin iframes, you need to pay attention to security and ensure that the embedded web page will not cause damage to the parent web page or user information.
# Operating system for this tutorial: Windows 10 system, Dell G3 computer.
Homologous iframe refers to iframe elements nested between different web pages under the same domain name. In web development, an iframe (inline frame) is an HTML element used to embed other web pages or documents within a web page.
Same origin means that two web pages have the same protocol (http or https), host and port number. When two web pages have the same source, they can communicate and interact freely, including reading and modifying each other's content. However, when two web pages do not have the same origin, communication between them will be restricted due to the browser's same-origin policy restrictions.
The same origin policy is a browser security mechanism used to prevent malicious websites from stealing users' sensitive information through cross-domain requests. According to the same origin policy, web pages can only access resources with the same origin, but cannot directly access resources from different origins. This means that if one web page wants to read or modify the content of another web page through JavaScript code, both web pages must have the same source.
However, by using the same origin iframe, communication and interaction between different origin web pages can be achieved. When a web page embeds another web page via an iframe, the embedded web pages are considered homologous because they have the same source. This means that the embedded web page can communicate and interact freely with the parent web page, including reading and modifying the content of the parent web page.
Some useful functions can be achieved through homologous iframes. For example, a web page can be embedded as part of another web page to display external content or provide additional functionality. Embedded web pages can obtain and transfer data through communication with the parent web page, realizing data sharing and interaction. In addition, through the same-origin iframe, cross-domain requests can be implemented to obtain data from different sources.
However, it should be noted that although same-origin iframes can achieve communication and interaction between web pages from different sources, they are still restricted by the same-origin policy. Embedded web pages can only access resources with the same origin, but cannot directly access resources from different origins. Therefore, when using same-origin iframes, you need to pay attention to security and ensure that the embedded web page will not cause damage to the parent web page or user information.
In short, homologous iframe refers to iframe elements nested between different web pages under the same domain name. Through same-origin iframes, web pages from different origins can communicate and interact to share data and provide additional functionality. However, you need to pay attention to the restrictions of the same-origin policy and ensure security. Same-origin iframe is a useful tool in web development, which can provide richer functionality and interactive experience for web pages.
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