Utilizing CSS Masks in Bootstrap 4

Is it possible to create a "Mask" effect in CSS without using Bootstrap 4 or 5? Adding a background color and z-index to an image doesn't seem to achieve the desired effect.

Learn more about creating masks in CSS here.

Answer №1

If you're utilizing Bootstrap-V5, there are already predefined classes available for positions such as absolute and relative. By simply adding these classes to your div element, you can easily create a masked card without having to write a single line of CSS code.

<link href="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="f5979a9a818681879485b5c0dbc5dbc5d897908194c4">[email protected]</a>/dist/css/bootstrap.min.css" rel="stylesheet">

<div class="container py-3">
  <div class="row">
    <div class="col-sm-8 col-md-4">
    
      <div class="position-relative">
        <img src="https://getbootstrap.com/docs/5.0/assets/img/bootstrap-icons.png" class="w-100">
        <div class="position-absolute top-0 left-0 d-flex justify-content-center align-items-center w-100 h-100 text-white fs-5" style="background: rgba(0,0,0,0.6);">
          Hello Mask
        </div>
      </div>
      
    </div>
  </div>
</div>

Answer №2

MDB bootstrap is a customized version of bootstrap with additional components, templates, animations, and more. It is not completely free.

The concept of a mask is straightforward. Here is how you can create one without using bootstrap:

.bg-image{
    position: relative;
    overflow: hidden;
    background-repeat: no-repeat;
    background-size: cover;
    width:300px;
}

.bg-image .mask{
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    color:#fff;
}

.bg-image .mask .text{
    height: 100%;
    display: flex!important;
    align-items: center!important;
    justify-content: center!important;
}

.bg-image .mask .text p{
    margin:0;
}
<div class="bg-image">
  <img src="https://mdbootstrap.com/img/new/standard/city/053.jpg" style="width:300px" />
  <div class="mask" style="background-color: rgba(0, 0, 0, 0.6)">
    <div class="text">
      <p>Hello There!</p>
    </div>
  </div>
</div>

Answer №3

To make it function properly, ensure that boostrap is installed

Installation instructions:

npm install bootstrap@3

Insert the following code in your script

<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha384-HSMxcRTRxnN+Bdg0JdbxYKrThecOKuH5zCYotlSAcp1+c8xmyTe9GYg1l9a69psu" crossorigin="anonymous">

<!-- Optional theme -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap-theme.min.css" integrity="sha384-6pzBo3FDv/PJ8r2KRkGHifhEocL+1X2rVCTTkUfGk7/0pbek5mMa1upzvWbrUbOZ" crossorigin="anonymous">

<!-- Latest compiled and minified JavaScript -->
<script src="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha384-aJ21OjlMXNL5UyIl/XNwTMqvzeRMZH2w8c5cRVpzpU8Y5bApTppSuUkhZXN0VxHd" crossorigin="anonymous"></script>

Answer №4

To uncover the solution, delve into the Developer Tools and observe how they tackled this particular issue. Their approach involves an image-container housing both the image and the mask. The mask is positioned absolutely, overlaying the image. Simplifying the code, it looks like this:

<div class="image-container">
      <img src="https://mdbootstrap.com/img/new/standard/city/053.jpg">
      <div class="mask" style="background-color: rgba(0, 0, 0, 0.6);"></div>
</div>

Here's the CSS snippet:

.image-container {
position: relative;
}

.mask {
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
width: 100%;
height: 100%;
overflow: hidden;
background-attachment: fixed;
}

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