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HTML-CSS: Focus Within

HTML-CSS : Exercise-19 with Solution

Using HTML, CSS changes the appearance of a form if any of its children are focused.

  • Use the pseudo-class :focus-within to apply styles to a parent element if any child element gets focused.

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 changes the appearance of a form if any of its children are focused</title>
</head>
<body>
 <form>
  <label for="username">Username:</label>
  <input id="username" type="text" />
  <br />
  <label for="password">Password:</label>
  <input id="password" type="text" />
</form>
</body>
</html>

CSS Code:

<style> 
form {
  border: 2px solid #CCBC82;
  padding: 8px;
  border-radius: 2px;
}

form:focus-within {
  background: #7CF0BD;
}

label {
  display: inline-block;
  width: 72px;
}

input {
  margin: 4px 12px;
}
</style>

HTML-CSS Editor:

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


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HTML-CSS: Tips of the Day

How to get CSS to select ID that begins with a string ?

[id^=product]

^= indicates "starts with". Conversely, $= indicates "ends with".

The symbols are actually borrowed from Regex syntax, where ^ and $ mean "start of string" and "end of string" respectively.

Ref: https://bit.ly/3rSZ2t7