What is the best way to horizontally center an absolute button within a div?

I'm currently attempting to center an absolute button within a div at the bottom, but unfortunately it doesn't seem to be working as expected. Here is my current approach:

.mc-item {
  background: #F0F0F0;
  border: 1px solid #DDD;
  height: 140px;
  padding: 20px;
}

.mc-item a {
  position: absolute;
  bottom: -19px;
  left: 50%;
}

.mc-item p {
  text-align: center;
}
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<div class="col-md-4 col-sm-12">
  <div class="mc-item">
    <p>Changez votre adresse email ou votre mot de passe.</p>
    <a asp-controller="MyAccount" asp-action="Settings" class="btn btn-primary">Paramètres</a>
  </div>
</div>

As seen below, this produces the following result:

https://i.sstatic.net/uesyD.png

I am aiming for the button to be centrally aligned. Is the left: 50% taking the entire .col div into account? I've attempted wrapping the button in a div, causing the div's width to match that of the .col div (not the div containing the <p>).

htmlcsstwitter-bootstrapbootstrap-4

Answer №1

Experiment with applying transform: translateX(-50%); to your button

Answer №2

When using Left:50%, the element will start from the center position of its container. Although the element is not initially in the center, applying Transform: translate(-50%,0) will shift it to the left by 50% of its width. This adjustment aligns the center of the element with the horizontal center of its container.

.mc-item {

  background: #F0F0F0;
  border: 1px solid #DDD;
  height: 140px;
  padding: 20px;
}

.mc-item a {
  position: absolute;
  bottom: -19px;
  left: 50%;
  transform: translate(-50%,0)
}

.mc-item p {
  text-align: center;
}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<div class="col-md-4 col-sm-12">
  <div class="mc-item">
    <p>Update your email address or password.</p>
    <a asp-controller="MyAccount" asp-action="Settings" class="btn btn-primary">Settings</a>
  </div>
</div>

Answer №3

.mc-item {
    background: #F0F0F0;
    border: 1px solid #DDD;
    height: 140px;
    padding: 20px;
    position: relative;
}

.mc-item a {
    position: absolute;
    bottom: -19px;
    left: 50%;
    transform: translateX(-50%);
}

.mc-item p {
    text-align: center;
}

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