Explanation and usage of Vertical-Align

Vertical-Align is a CSS property used to set the vertical alignment of elements, typically inline elements or table cells.

The principle of this attribute is to achieve vertical alignment by changing the line height of elements. Specifically, when the Vertical-Align property is set, the line height of elements will be adjusted based on the specified alignment method, thus achieving the effect of vertical alignment.

Here is how you can use the Vertical-Align property:

1. This property can be used for inline elements and table cells. Vertical alignment for inline elements is relative to the line box, while for table cells, it is relative to the cell box.
2. There are several possible values for the Vertical-Align property:

1. Default value: The baseline of the element is aligned with the baseline of the parent element.
2. The baseline of the element is aligned with the subscript baseline of the parent element.
3. super: The baseline of the element is aligned with the superscript baseline of the parent element.
4. top: align the top of the element with the top of its parent element.
5. Text-top: The top of the element is aligned with the top of the parent element’s text.
6. middle: The center of the element is aligned with the center of the baseline of the parent element.
7. The bottom of the element aligns with the bottom of the parent element.
8. The bottom of the element is aligned with the text bottom of the parent element.

1. The Vertical-Align property can also accept specific length or percentage values for adjustment. These values will be positioned relative to the baseline of the parent element.

It is important to note that the Vertical-Align property only applies to inline elements and table cells, and its appearance may be affected by other factors such as font size and line height. When using the Vertical-Align property, it is necessary to combine it with other layout properties to achieve the desired vertical alignment effect.