I ran across some CSS that I though was pretty cool, but can't seem to find
much information on its usage. What do you think?
Some simple code to show first:
<!DOCTYPE html>
<head>
<meta charset="UTF-8" />
<meta name="viewport"
content="width=device-width, initial-scale=1.0">
<title>Test Page</title>
<style type="text/css">
input {
width:200px;
}
.help {
display:none;
font-size:90%;
}
input:focus + .help {
display:inline-block;
}
</style>
</head>
<body>
<label for="name">Name (required):</label>
<input type="text" id="name" name="name" value=""
aria-describedby="name-format" required>
<span id="name-format" class="help">Format: Firstname,
Lastname</span>
</body>
</html>
Clicking in the input field changes the class .help, although the input field
has no class attached to it.
Are there any other attributes that have this capability?
Greg
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