What does width mean in iframe

Width in iframe means the width of the specified frame, which can control the width display of the iframe frame on the page. Acceptable values ​​for width: 1. Fixed pixel value, width="300px", the frame width will always remain unchanged, no matter how the size of the browser window changes; 2. Percentage value, width="50%", the width of the frame It will be adaptively adjusted according to the width of its parent element; 3. Automatic value, width="auto", the width of the frame will be adaptively adjusted according to the width of its content.

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

In web development, `iframe` is an HTML tag used to embed other web pages or documents in the page. The `iframe` tag can create a stand-alone inline frame that can load a specified URL or display embedded content. The `iframe` tag has a `width` attribute, which is used to set the width of the frame.

The `width` attribute is used to specify the width of the `iframe` frame and can accept the following values:

- Fixed pixel value: You can use pixel values ​​(such as `width="300px"`) to set the fixed width of the frame. This way the width of the frame will always remain the same regardless of the size of the browser window.

- Percentage value: You can use a percentage value (such as `width="50%"`) to set the relative width of the frame. This way, the width of the frame will adjust adaptively based on the width of its parent element. For example, if the parent element's width is 800 pixels, then `width="50%"` will make the frame 400 pixels wide.

- Automatic value: You can use `width="auto"` to set the width of the frame to adjust automatically. This way, the width of the frame will adjust adaptively based on the width of its content. For example, if the width of the web page or document loaded in the frame is 500 pixels, the width of the frame will also be automatically adjusted to 500 pixels.

It should be noted that the `width` attribute can only set the width of the frame, not the height. If you want to set the height of the frame, you can use the `height` property.

Here are some examples that demonstrate how to use the `width` attribute to set the width of an `iframe` frame:

<!-- 使用固定像素值设置框架宽度为300像素 -->
<iframe src="https://www.example.com" width="300px" height="200px"></iframe>
<!-- 使用百分比值设置框架宽度为50% -->
<iframe src="https://www.example.com" width="50%" height="200px"></iframe>
<!-- 使用自动值设置框架宽度自适应内容 -->
<iframe src="https://www.example.com" width="auto" height="200px"></iframe>

Summary:

`iframe ` is an HTML tag used to embed other web pages or documents in a web page. The `width` attribute of the `iframe` tag is used to set the width of the frame, which can accept fixed pixel values, percentage values ​​or automatic values. By setting the `width` attribute, you can control the width of the `iframe` frame displayed on the page.

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