If you use source elements in markup, SRC will be an empty string. Of the properties, the only ones immediately available are width and height, which set the size of the container.

如果您在标记中使用源元素，src将是一个空字符串，唯一立即可用的是width和height，用于设置容器的大小。

youdao

First, the use of overflow may affect fluid height for the container.

首先，使用溢出可能会影响容器的fluid height。

youdao

H So there's extra height, h, of liquid inside the container relative to what's outside it.

这多出的高度，是里面的液面相对于，外面的液面的高度。

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