This content originally appeared on DEV Community and was authored by Billy Coloe
The :placeholder-shown pseudo-class represents any <input> or <textarea> element that is displaying placeholder text.
With this rule, we can do this type styling that would otherwise require the aid of JavaScript:
<input name="food" placeholder=" " />
<label for="food">Favorite food</label>
const input = document.querySelector('input');
input.addEventListener('focus', () => {
// Add parent class to move label above input
});
input.addEventListener('blur', () => {
// Check if input has value
// Remove parent class to reset label
});
But instead of all this overhead, we can leverage the :focus and :placeholder-shown CSS rules:
input:focus + label,
input:not(:placeholder-shown) + label {
top: 14px;
left: 6px;
font-size: 12px;
color: #fff;
}
Here we check if the input has focus OR if it does not have the placeholder shown (meaning there is a text value). If either of these states apply, we have the label float to the top left.
A hell of a lot easier than JS event handlers! ?
Here's a video using this in action:
Check out more #JSBits at my blog, jsbits-yo.com. Or follow me on Twitter and TikTok.
This content originally appeared on DEV Community and was authored by Billy Coloe
Billy Coloe | Sciencx (2021-06-28T17:03:13+00:00) CSS :placeholder-shown. Retrieved from https://www.scien.cx/2021/06/28/css-placeholder-shown/
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