What are the links between iframes?

iframes are linked by methods such as hyperlinks, JavaScript, parent windows, and message passing. Detailed description: 1. Use hyperlinks to embed a hyperlink in an iframe. When the user clicks the link, a new web page will be loaded in the same iframe; 2. JavaScript, bind a JavaScript function to a button in an iframe. , when the user clicks the button, this function will load the web page in another iframe; 3. Parent window, etc.

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

In web design and development, iframe (inline frame) is a very common technology, which can embed a web page within another web page. This embedding method can provide users with richer content and interactive experience. However, when we use multiple iframes in a web page, how to link between them is an important issue.

There are many ways to link between iframes, some common techniques and practices will be introduced below.

1. Use hyperlinks (anchor tag): The easiest way is to use hyperlinks in iframes. Embed a hyperlink in an iframe and when the user clicks on the link, a new web page will be loaded in the same iframe. This method is suitable for loading different web pages in the same iframe.

2. Using JavaScript: By using JavaScript, we can make more complex links between iframes. For example, we can bind a JavaScript function to a button in an iframe. When the user clicks the button, the function will load a web page in another iframe. This method is suitable for situations where interaction in different iframes is required.

3. Use the parent window: If we need two-way communication between different iframes, we can use the parent window. The parent window is the window that contains all iframes. We can control different iframes through the JavaScript function of the parent window. For example, we can bind a JavaScript function to a button in an iframe, which will call the function of the parent window to load a web page in another iframe.

4. Use message passing: Messaging is a method of communicating between different iframes. By using HTML5's postMessage function, we can send messages between different iframes. For example, when a button in one iframe is clicked, a message can be sent to another iframe telling it to load a new web page.

It should be noted that when linking between iframes, we need to ensure that the linked web pages are under the same domain name. Due to browser security policies, iframes under different domain names cannot communicate.

To summarize, when using multiple iframes in a web page, we can use methods such as hyperlinks, JavaScript, parent windows, and messaging to link between them. These methods can provide users with richer content and interactive experience, and can achieve two-way communication between different iframes. However, it should be noted that the linked web pages must be under the same domain name to comply with the browser's security policy.

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