Guide to CSS line-height properties: line-height and vertical-align

CSS line-height property guide: line-height and vertical-align, specific code examples required

Title: CSS line-height property guide: line-height and vertical- align

Introduction:
In the process of web design or front-end development, we often need to adjust the line height and vertical alignment of text to achieve better layout effects. In CSS, we can use the two properties line-height and vertical-align to achieve this purpose. This article will detail the usage of these two properties and provide specific code examples.

1. Line-height attribute:
The line-height attribute is used to set the line spacing, which can control the height of the text line. In CSS, we can set line height using relative units or absolute units.

1.1 Relative unit adjustment of line height
Using relative units can adaptively adjust the line height according to the text font size. For example:

p { line-height: 1.5; }

The above code will set the line height of the paragraph element to 1.5 times the font size.

1.2 Fixed unit to adjust row height
Using fixed unit can directly set the fixed value of row height. For example:

h1 { line-height: 40px; }

The above code will set the line height of the h1 title to 40 pixels.

1.3 Adjust row height by percentage
We can also use percentage to adjust row height. For example:

blockquote { line-height: 150%; }

The above code will set the line height of the reference block element to 150% of the height of the parent element.

2. Vertical-align attribute:
The vertical-align attribute is used to set the vertical alignment of elements, mainly applied to inline elements or inline block elements.

2.1 Vertical center alignment of text
You can align text vertically in the center by setting the vertical-align attribute. For example:

span { vertical-align: middle; }

The above code will vertically center align the text of the span element.

2.2 Align the image vertically in the center
We can also use the vertical-align attribute to align the image vertically in the center. For example:

img { vertical-align: middle; }

The above code will align the image of the img element vertically in the center.

2.3 Table cell vertical center alignment
In the table, we can use the vertical-align attribute to set the vertical center alignment of the content in the cell. For example:

td { vertical-align: middle; }

The above code will center-align the content in the table cell vertically.

Conclusion:
In the process of web design or front-end development, reasonable use of line-height and vertical-align attributes can effectively adjust the line height and vertical alignment of text and improve the layout effect of the page. By using relative units, fixed units, or percentages, we can adjust the row height as needed. By setting the vertical-align property, we can easily achieve vertical alignment of text, images, and table cells. I hope that the content introduced in this article can provide some help for everyone's typesetting work in front-end development.

The above is what this article will introduce, I hope it can inspire everyone. Thanks for reading!

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