Bootstrap 4 Center Vertical And Horizontal Alignment


Answer :

Update 2019 - Bootstrap 4.3.1

There's no need for extra CSS. What's already included in Bootstrap will work. Make sure the container(s) of the form are full height. Bootstrap 4 now has a h-100 class for 100% height...

Vertical center:

<div class="container h-100">   <div class="row h-100 justify-content-center align-items-center">     <form class="col-12">       <div class="form-group">         <label for="formGroupExampleInput">Example label</label>         <input type="text" class="form-control" id="formGroupExampleInput" placeholder="Example input">       </div>       <div class="form-group">         <label for="formGroupExampleInput2">Another label</label>         <input type="text" class="form-control" id="formGroupExampleInput2" placeholder="Another input">       </div>     </form>      </div> </div>

https://codeply.com/go/raCutAGHre

the height of the container with the item(s) to center should be 100% (or whatever the desired height is relative to the centered item)

Note: When using height:100% (percentage height) on any element, the element takes in the height of it's container. In modern browsers vh units height:100vh; can be used instead of % to get the desired height.

Therefore, you can set html, body {height: 100%}, or use the new min-vh-100 class on container instead of h-100.

Horizontal center:

  • text-center to center display:inline elements & column content
  • mx-auto for centering inside flex elements
  • offset-* or mx-auto can be used to center columns (.col-)
  • justify-content-center to center columns (col-*) inside row

Vertical Align Center in Bootstrap 4
Bootstrap 4 full-screen centered form
Bootstrap 4 center input group
Bootstrap 4 horizontal + vertical center full screen


This work for me:

<section class="h-100">   <header class="container h-100">     <div class="d-flex align-items-center justify-content-center h-100">       <div class="d-flex flex-column">         <h1 class="text align-self-center p-2">item 1</h1>         <h4 class="text align-self-center p-2">item 2</h4>         <button class="btn btn-danger align-self-center p-2" type="button" name="button">item 3</button>       </div>     </div>   </header> </section>

flexbox can help you. info here

<div class="d-flex flex-row justify-content-center align-items-center" style="height: 100px;">     <div class="p-2">      1     </div>     <div class="p-2">      2     </div> </div>

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