Changing Layouts Based on Screen Size using CSS

To change the layouts based on screen size in CSS, we will create a parent div and set divs in it. Using Media Queries, the layout of the screen size will be changed. Media Queries is used when you need to set a style to different devices such as tablet, mobile, desktop, etc.

Create a Parent div

The divs on the web page is set inside a parent div −

<div class="colContainer">
   <!- - Set the divs  - ->
</div>

The following is set to make the container i.e. the parent div behave like a table −

.colContainer:after {
   content: "";
   display: table;
   clear: both;
}

Set Divs in the Parent div

We have set four divs inside the parent div −

<div class="col" style="background-color: rgb(153, 29, 224);">
   <h2>First col</h2>
</div>
<div class="col" style="background-color: rgb(12, 126, 120);">
   <h2>Second col</h2>
</div>
<div class="col" style="background-color: rgb(207, 41, 91);">
   <h2>Third col</h2>
</div>
<div class="col" style="background-color: rgb(204, 91, 39);">
   <h2>Fourth col</h2>
</div>

The width of the divs is set using the width property −

* {
   box-sizing: border-box;
}
.col {
   color: white;
   float: left;
   width: 25%;
   padding: 10px;
}

Change the Layout

When the screen size gets smaller than 900px, the width is set 50% −

@media screen and (max-width: 900px) {
   .col {
      width: 50%;
   }
}

When the screen size gets smaller than 600px, the width is 100% −

@media screen and (max-width: 600px) {
   .col {
      width: 100%;
   }
}

Example

Let us see the complete example −

<!DOCTYPE html>
<html>
<head>
   <meta name="viewport" content="width=device-width, initial-scale=1" />
   <style>
      body {
         font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
      }
      * {
         box-sizing: border-box;
      }
      .col {
         color: white;
         float: left;
         width: 25%;
         padding: 10px;
      }
      .colContainer:after {
         content: "";
         display: table;
         clear: both;
      }
      @media screen and (max-width: 900px) {
         .col {
            width: 50%;
         }
      }
      @media screen and (max-width: 600px) {
         .col {
            width: 100%;
         }
      }
   </style>
</head>
<body>
   <h1>Changing layout on screen size using CSS</h1>
   <p>Resize the screen to see the below divs resize themselves</p>
   <div class="colContainer">
      <div class="col" style="background-color: rgb(153, 29, 224);">
         <h2>First col</h2>
      </div>
      <div class="col" style="background-color: rgb(12, 126, 120);">
         <h2>Second col</h2>
      </div>
      <div class="col" style="background-color: rgb(207, 41, 91);">
         <h2>Third col</h2>
      </div>
      <div class="col" style="background-color: rgb(204, 91, 39);">
         <h2>Fourth col</h2>
      </div>
   </div>
</body>
</html>

Updated on: 30-Oct-2023

10K+ Views

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