The tags of iframe include src, srcdoc, name, sandbox, allowfullscreen, width and height, frameborder, scrolling, allow and deny, etc. Detailed description: 1. src, specifies the URL of the document to be embedded; 2. srcdoc, specifies the content of the document to be embedded; 3. name, specifies the name of the iframe, used to reference the iframe through JavaScript, etc.
# Operating system for this tutorial: Windows 10 system, Dell G3 computer.
iframe is an element in HTML that allows embedding another document in a web page, that is, creating an inline frame. It has many tags and properties that can be used to control embedded content and behavior. Here are some commonly used iframe tags:
src: Specifies the URL of the document to be embedded. This is a required tag.
srcdoc: Specifies the content of the document to be embedded. This is an optional tag that can replace the src tag.
name: Specify the name of the iframe, used to reference the iframe through JavaScript. This is an optional tag.
sandbox: Specify whether the content of the iframe is restricted, such as not allowing script execution, not allowing automatic playback of audio and video, not allowing changes to page content, etc. This is an optional tag.
allowfullscreen: Specify whether to allow full-screen content in iframes. This is an optional tag.
width and height: Specify the width and height of the iframe. These tags are optional, but you usually need to set them to ensure that the embedded content fits the page layout.
frameborder: Specify whether to display the iframe border. This is an optional flag, usually set to "0" to display no borders.
scrolling: Specify whether to display scroll bars in the iframe. This is an optional flag that can be set to "yes", "no", or "auto" to indicate whether the scrollbar should be displayed or automatically determined based on the content.
allow and deny: These tags are used to set whether the content of the iframe allows specific permission operations, such as cross-domain requests, form submission, etc. These tags are optional and are no longer supported in newer browsers.
In addition to the above tags, there are also some new tags and attributes added to HTML5, such as seamless, allowpaymentdata, etc. These tags can provide more control and functionality to meet specific needs.
It should be noted that the use of iframe tags may be affected by cross-domain policies, especially when handling cross-domain requests. Special handling is required. In addition, security and user experience issues need to be considered when using iframes to embed content.
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