React Bootstrap: Vertical Alignment of Row's Columns

React Bootstrap: Vertical alignment of row's columns?

If you are using table rows, you can wrap contents within a <div>..</div>

like:

<tr>
  <div classname="align-me"></div>
</tr>

and then you can use flexbox to align them dynamically:

tr .align-me {
  display: flex;
  align-items: center;
}

Centering elements in row (vertically) with react-bootstrap

There are many ways to center things in css: https://www.w3.org/Style/Examples/007/center.en.html

I would recommend you to use flexbox as much as possible, as it is powerful but simple tool. Many people just overuse grid. In your case you just stack vertically, so you have only one dimension.

When you work with bootstrap, you can use its utility classes: https://getbootstrap.com/docs/5.1/utilities/flex/

Also, when you use react-bootstrap, there is one abstraction more, called Stacks: https://react-bootstrap.netlify.app/layout/stack/#stacks

I have created a Sandbox. Please look into it and tell me, if it's something you are looking for, because I'm still unsure what you try to achieve: https://codesandbox.io/s/musing-satoshi-nhuood?file=/src/App.js

With "align-items" and "justify-content" you can center your content according to the axes. As isherwood mentioned in his comment h3 gets extra bottom margin. So when you want to have it centered to 100%, you have to remove it too.

Vertically center elements using React-Bootstrap

Here is my solution

Codesandbox

I have vertically centred content for the red section, using flexbox and putting some padding around it.

Since you are using bootstrap, I have used inbuilt bootstrap css classes.

react-bootstrap align-middle not working for Columns

Add class d-flex with your Col to make it display:flex.
You can use class justify-content-centre to center your content horizontally.
Use class align-items-center to center your content vertically.

Why will my SVG not vertically align in React Bootstrap?

This answer after testing appears to only work when applying it to text. After further paths down the rabbit hole and reading several Codepens and Codeplys around Bootstrap I was able to solve vertical image centering by targeting the Container, component:

import React from 'react'

import { Container, Row, Col, Image } from 'react-bootstrap'

// SVG
import comingSoonSVG from './coming-soon.svg'

const ComingSoon = () => {
  return (
    <Container style={containerStyles}>
      <Row>
        <Col md={{ span: 6, offset: 3 }} className="d-flex justify-content-center">
          <Image style={imgStyles} src={comingSoonSVG} alt="Coming Soon" />
        </Col>
      </Row>
    </Container>
  )
}

const containerStyles = {
  minHeight: '100vh',
  display: 'flex',
  flexDirection: 'column',
  alignItems: 'center',
  justifyContent: 'center',
}

const imgStyles = {
  height: '60vmin',
}

export default ComingSoon

Vertical Align Center in Bootstrap 4

Important! Vertical center is relative to the height of the parent

If the parent of the element you're trying to center has no defined
height, none of the vertical centering solutions will work!

Now, onto vertical centering...

Bootstrap 5 (Updated 2021)

Bootstrap 5 is still flexbox based so vertical centering works the same way as Bootstrap 4. For example, align-items-center, justify-content-center or auto margins can used on the flexbox parent (row or d-flex).

• use align-items-center on a flexbox row parent (row or d-flex)
• use justify-content-center on a flexbox column parent (d-flex flex-column)
• use my-auto on a flexbox parent

Vertical Center in Bootstrap 5

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Bootstrap 4

You can use the new flexbox & size utilities to make the container full-height and display: flex. These options don't require extra CSS (except that the height of the container (ie:html,body) must be 100%).

Option 1 align-self-center on flexbox child

<div class="container d-flex h-100">
    <div class="row justify-content-center align-self-center">
     I'm vertically centered
    </div>
</div>

https://codeply.com/go/fFqaDe5Oey

Option 2 align-items-center on flexbox parent (.row is display:flex; flex-direction:row)

<div class="container h-100">
    <div class="row align-items-center h-100">
        <div class="col-6 mx-auto">
            <div class="jumbotron">
                I'm vertically centered
            </div>
        </div>
    </div>
</div>

https://codeply.com/go/BumdFnmLuk

Option 3 justify-content-center on flexbox parent (.card is display:flex;flex-direction:column)

<div class="container h-100">
    <div class="row align-items-center h-100">
        <div class="col-6 mx-auto">
            <div class="card h-100 border-primary justify-content-center">
                <div>
                    ...card content...
                </div>
            </div>
        </div>
    </div>
</div>

https://codeply.com/go/3gySSEe7nd

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More on Bootstrap 4 Vertical Centering

Now that Bootstrap 4 offers flexbox and other utilities, there are many approaches to vertical
alignment. http://www.codeply.com/go/WG15ZWC4lf

1 - Vertical Center Using Auto Margins:

Another way to vertically center is to use my-auto. This will center the element within it's container. For example, h-100 makes the row full height, and my-auto will vertically center the col-sm-12 column.

<div class="row h-100">
    <div class="col-sm-12 my-auto">
        <div class="card card-block w-25">Card</div>
    </div>
</div>

Vertical Center Using Auto Margins Demo

my-auto represents margins on the vertical y-axis and is equivalent to:

margin-top: auto;
margin-bottom: auto;

---

2 - Vertical Center with Flexbox:

Since Bootstrap 4 .row is now display:flex you can simply use align-self-center on any column to vertically center it...

       <div class="row">
           <div class="col-6 align-self-center">
                <div class="card card-block">
                 Center
                </div>
           </div>
           <div class="col-6">
                <div class="card card-inverse card-danger">
                    Taller
                </div>
          </div>
    </div>

or, use align-items-center on the entire .row to vertically center align all col-* in the row...

       <div class="row align-items-center">
           <div class="col-6">
                <div class="card card-block">
                 Center
                </div>
           </div>
           <div class="col-6">
                <div class="card card-inverse card-danger">
                    Taller
                </div>
          </div>
    </div>

Vertical Center Different Height Columns Demo

See this Q/A to center, but maintain equal height

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3 - Vertical Center Using Display Utils:

Bootstrap 4 has display utils that can be used for display:table, display:table-cell, display:inline, etc.. These can be used with the vertical alignment utils to align inline, inline-block or table cell elements.

<div class="row h-50">
    <div class="col-sm-12 h-100 d-table">
        <div class="card card-block d-table-cell align-middle">
            I am centered vertically
        </div>
    </div>
</div>

Vertical Center Using Display Utils Demo

More examples
Vertical center image in <div>
Vertical center .row in .container

Vertical center and bottom in <div>
Vertical center child inside parent

Vertical center full screen jumbotron

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Important! Did I mention height?

Remember vertical centering is relative to the height of the parent element. If you want to center on the entire page, in most cases, this should be your CSS...

body,html {
  height: 100%;
}

Or use min-height: 100vh (min-vh-100 in Bootstrap 4.1+) on the parent/container. If you want to center a child element inside the parent. The parent must have a defined height.

Also see:

Vertical alignment in bootstrap 4

Bootstrap Center Vertical and Horizontal Alignment

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