cssvertical-align（cssverticalalign在PDF文件里面不生效）

CSS Vertical-Align

CSS Vertical-Align is a property that controls the vertical alignment of the content within a container element. This property can be used to align images, text and other content vertically inside a container element.

Types of Vertical Alignment

There are several types of vertical alignment available in CSS:

1. Top: This aligns the content at the topmost position within the container element.

2. Middle: This aligns the content in the center of the container element.

3. Bottom: This aligns the content at the bottommost position within the container element.

4. Baseline: This aligns the content to the baseline of the container element.

5. Sub: This aligns the content to the subscript position (downwards from the baseline).

6. Super: This aligns the content to the superscript position (upwards from the baseline).

Using Vertical-Align Property

In order to use the vertical-align property, the container element needs to have a defined height. This property can be applied to text, images, and other inline elements within the container element.

Here is an example syntax for applying vertical alignment to an element:

.container-element {

height: 200px;

vertical-align: middle;

In the above example, vertical alignment is applied to a container element with a defined height of 200px. The property ‘middle’ is applied to align the content in the center of the container.

Vertical Alignment with Text

By default, text is vertically aligned to the baseline of the container element. However, this can be changed using the vertical-align property.

Here is an example to vertically align text to the middle of a container:

.container-element{

display: inline-block;

height: 200px;

line-height: 200px;

vertical-align: middle;

}

.text-element{

display: inline-block;

vertical-align: middle;

In this example, the text element is vertically aligned to the middle of the container. The line-height property is used to set the height of the text element, which is then used for vertical alignment.

Conclusion

The CSS vertical-align property is a powerful tool for aligning content vertically within a container element. With a few simple CSS rules, you can align images, text, and other inline content vertically to achieve a visually pleasing presentation.