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.
What is the difficulty level of this exercise?
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HTML-CSS: Tips of the Day
What is the difference between id and class in CSS, and when should I use them?
Example:
<div id="header_id" class="header_class"> Text </div>
#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:
<div id="header_id" class="header_class"> Text </div>
#header_id {color:#fff} .header_class {color:#000}
The text would be white.
Ref: https://bit.ly/39Stv4P
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