How to vertically center css text

How to vertically center text in css: 1. Use the line-height attribute to vertically center text; 2. Format external blocks into table cells; 3. Vertically center text through CSS3 flex layout.

The operating environment of this article: Windows7 system, HTML5&&CSS3 version, Dell G3 computer.

Method:

Method 1: Use the line-height property to vertically center the text

The line-height property sets the distance between lines (line height ); negative values are not allowed for this attribute.

The line-height property affects the layout of the line box. When applied to a block-level element, it defines the minimum distance between baselines in that element rather than the maximum distance.

The calculated difference between line-height and font-size (known as "line spacing" in CSS) is divided into two halves and added to the top and bottom of a line of text content. The smallest box that can contain this content is a line box.

      
  
css 垂直居中了--文本文字
  

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Method 2: Format outer block into table cell

The content of table cell can be vertical Center, format the outer block as a table cell to vertically center the text.

Example: Placing a paragraph inside a block with a specific given height

      
  
css 垂直居中了--文本文字
  

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Method 3: Using CSS3 The flex layout makes the text vertically centered

      
  
css 垂直居中--文本文字（弹性布局）
  

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