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How to apply bottom border with only Input text field using CSS ?

Last Updated : 30 Jan, 2024
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Adding a bottom border to the input field visually distinguishes it from surrounding elements on the page. Making input fields stand out on a website in a form for example is crucial. Styling these inputs with clear borders, appealing colors, and effects, can easily capture the user’s attention.

Using border-width Property

The border-width property in CSS is used to set the width of the border on all four sides of an element. It is a shorthand property that allows you to set the width of the top, right, bottom, and left borders. To style the border at the bottom set the property outline: 0; removes the default focus outline on the input field. Then, The border-width: 0 0 2px; sets the border width for the input field, applying a 2-pixel bottom border.

Example: Illustration of the bottom border with only the Input text field using the border-width property.

HTML




<!DOCTYPE html>
<html lang="en">
  
<head>
    <meta charset="UTF-8" />
    <meta name="viewport" content=
          "width=device-width, initial-scale=1.0" />
    <title>Bottom border on input text field</title>
    <style>
        div {
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            flex-direction: column;
        }
  
        h1 {
            color: green;
        }
  
        input {
            outline: 0;
            border-width: 0 0 2px;
            border-color: green;
        }
    </style>
</head>
  
<body>
    <div>
        <h1>GeeksforGeeks</h1>
        <input type="text" 
               placeholder="Enter your message.."
               id="geek" 
               name="geek" />
    </div>
</body>
  
</html>


Output:

text-field

Using the ::after pseudo-element

The ::after pseudo-element in CSS is used to insert content after an element’s actual content. It is often used for decorative purposes or to add additional styling elements. The .input-field::after, Selects the ::after pseudo-element of elements with the class .input-field. The property bottom: -2px; shifts the pseudo-element 2 pixels below the bottom edge of the .input-field container, creating the effect of a bottom border. Sets the height to 2 pixels, defining the thickness of the bottom border.

Example: Illustration of the bottom border with only the Input text field using the ::after pseudo-element.

HTML




<!DOCTYPE html>
<html lang="en">
  
<head>
    <meta charset="UTF-8" />
    <meta name="viewport" content=
          "width=device-width, initial-scale=1.0" />
    <title>Bottom border on input text field</title>
    <style>
        .wrapper {
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            flex-direction: column;
        }
  
        h1 {
            color: green;
        }
  
        .input-field {
            position: relative;
        }
  
        .input-field::after {
            content: "";
            position: absolute;
            width: 100%;
            height: 2px;
            background-color: green;
            bottom: -2px;
            left: 0;
        }
  
        input {
            border: none;
            outline: none;
        }
    </style>
</head>
  
<body>
    <div class="wrapper">
        <h1>GeeksforGeeks</h1>
        <div class="input-field">
            <input type="text"
                   placeholder="Enter your message.."
                   id="geek"
                   name="geek" />
        </div>
    </div>
</body>
  
</html>


Output:

text-field



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