Centering in Bootstrap using Flexbox

Use Flexbox in Bootstrap to implement element centering: horizontal centering: use the "justify-content: center;" attribute of the parent element. Vertical centering: Use the "align-items: center;" and "height: 100vh;" properties of the parent element. Other options: You can set the "align-self" attribute for a single element, or use the "margin: auto;" attribute to automatically align elements.

Centering in Bootstrap using Flexbox

In Bootstrap, Flexbox provides a variety of options to center elements horizontally or vertically. Using Flexbox centering elements is simple and flexible.

Center horizontally

To center the element horizontally, add the following attributes to the parent element:

 <code class="css">justify-content: center;</code>

This property arranges the child elements horizontally within the parent element.

Vertical centered

To center the element vertically, you can combine the following two properties:

1. align-items: center; : This property arranges children vertically within the parent element.
2. height: 100vh; : This property sets the height of the parent element to the window height to ensure that the element is centered in the vertical direction.

Other options

In addition to these basic options, Flexbox also provides additional options to control centering:

• align-self: This property allows setting alignment for a single child element, overriding the settings of the parent element.
• margin: auto: This property can automatically align elements from the edges of their parent elements.

Example

Here is an example of using Flexbox to center text horizontally and vertically in Bootstrap:

 <code class="html"><div class="d-flex justify-content-center align-items-center" style="height: 100vh;"> <p>居中文本</p> </div></code>

By using these properties, you can easily implement horizontal and vertical centering of elements in Bootstrap.

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