我看到 section 10.3 Non-replaced elements in the HTML5 spec .我能够通过 Google 找到定义，但 W3C HTML5 对非替换元素与替换元素的定义在哪里？
最佳答案
来自CSS2.1 spec :
Replaced Element
An element whose content is outside the scope of the CSS formatting model, such as an image, embedded document, or applet. For example, the content of the HTML IMG element is often replaced by the image that its "src" attribute designates. Replaced elements often have intrinsic dimensions: an intrinsic width, an intrinsic height, and an intrinsic ratio. For example, a bitmap image has an intrinsic width and an intrinsic height specified in absolute units (from which the intrinsic ratio can obviously be determined). On the other hand, other documents may not have any intrinsic dimensions (for example, a blank HTML document).
User agents may consider a replaced element to not have any intrinsic dimensions if it is believed that those dimensions could leak sensitive information to a third party. For example, if an HTML document changed intrinsic size depending on the user's bank balance, then the UA might want to act as if that resource had no intrinsic dimensions.
The content of replaced elements is not considered in the CSS rendering model.
关于HTML5 : Non-replaced vs. 替换元素？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/8012297/