Where is the iframe parent page?

The iframe parent page is the page in the HTML page that contains the iframe tag. In web development, the iframe tag is used to embed another web page in a web page to create an inline frame. The embedded web page is the child page of the iframe, and the web page containing the iframe tag is the parent page of the iframe. When the browser parses a parent page that contains an iframe tag, it creates a new browsing context to load and display the child page, which means that the parent page and the child page are independent of each other

The operating system of this tutorial: windows10 system, Dell G3 computer.

iframe parent page refers to the page in the HTML page that contains the iframe tag. In web development, the iframe tag is used to embed a web page within another web page, creating an inline frame. This embedded web page is the child page of the iframe, and the web page containing the iframe tag is the parent page of the iframe.

In HTML, you can use the following code to create an iframe tag:

<iframe src="子级页面的URL" width="宽度" height="高度"></iframe>

In this code, the src attribute specifies the URL of the child page, and the width and height attributes specify the iframe. width and height.

When the browser parses a parent page that contains an iframe tag, it creates a new browsing context to load and display the child page. This means that the parent page and the child page are independent of each other, with their own DOM trees, CSS styles, and JavaScript environments.

Parent pages can communicate with child pages through JavaScript. For example, you can use the following code to get the content of the child page in the parent page:

var iframe = document.getElementsByTagName('iframe')[0];
var iframeContent = iframe.contentDocument.body.innerHTML;

In this code, the first iframe element is obtained through the getElementsByTagName method, and then the contentDocument attribute is used to access the child page. Document object, and finally obtain the content of the child page through the innerHTML attribute.

In summary, the iframe parent page is an HTML page containing the iframe tag. It displays the content of other web pages by embedding child pages, and can communicate with child pages through JavaScript.

The above is the detailed content of Where is the iframe parent page?. For more information, please follow other related articles on the PHP Chinese website!