HTML-CSS: Input with prefix

Last update on May 28 2022 07:25:10 (UTC/GMT +8 hours)

HTML-CSS : Exercise-18 with Solution

Using HTML, CSS creates an input with a visual, non-editable prefix.

Use display: flex to create a container element.
Remove the border and outline from the <input> field. Apply them to the parent element instead to make it look like an input box.
Use the :focus-within pseudo-class selector to style the parent element accordingly, when the user interacts with the <input> field.

HTML Code:

<!--License: https://bit.ly/3GjrtVF-->
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Using HTML, CSS creates an input with a visual, non-editable prefix.</title>
</head>
<body>
 <div class="input-box">
  <span class="prefix">+20</span>
  <input type="tel" placeholder="disabled"/>
</div>
</body>
</html>

CSS Code:

<style> 
.input-box {
  display: flex;
  align-items: center;
  max-width: 300px;
  background: #CCC;
  border: 1px solid #a0a0a0;
  border-radius: 4px;
  padding-left: 0.5rem;
  overflow: hidden;
  font-family: sans-serif;
}

.input-box .prefix {
  font-weight: 300;
  font-size: 14px;
  color: #999;
}

.input-box input {
  flex-grow: 1;
  font-size: 14px;
  background: #fff;
  border: none;
  outline: none;
  padding: 0.5rem;
}

.input-box:focus-within {
  border-color: #777;
}
</style>

HTML-CSS Editor:

See the Pen html-css-practical-exercises by w3resource (@w3resource) on CodePen.

HTML-CSS: Tips of the Day

What is the difference between id and class in CSS, and when should I use them?

Example:

#header_id {font-color:#fff} .header_class {font-color:#000}

(Note that CSS uses the prefix # for IDs and . for Classes.)

However color was an HTML 4.01 <font> tag attribute deprecated in HTML 5. In CSS there is no "font-color", the style is color so the above should read:

Example:

#header_id {color:#fff} .header_class {color:#000}

The text would be white.

Ref: https://bit.ly/39Stv4P