Day 19: the placeholder-shown pseudo-class

posted on

It’s time to get me up to speed with modern CSS. There’s so much new in CSS that I know too little about. To change that I’ve started #100DaysOfMoreOrLessModernCSS. Why more or less modern CSS? Because some topics will be about cutting-edge features, while other stuff has been around for quite a while already, but I just have little to no experience with it.

You can use the :placeholder-shown pseudo-class to select input fields with a placeholder that haven't been filled out yet.

input:placeholder-shown {
  outline: 5px solid blue;
}
<p>
  <label for="name">Name</label>
  <input type="text" id="name" placeholder="your name…" value="Johanna">
</p>

<p>
  <label for="email">E-Mail</label>
  <input type="email" id="email" placeholder="name@domain.com">
</p>

PS: Yeah, I know, that one has been around for quite a while already, but I started writing CSS 15 years ago. So anything that was published after 2015 is modern CSS for me. :)

See on CodePen

Further reading

Do you want to learn even more awesome CSS?

I'm running a workshop with my friends at Smashing Magazine in which I introduce you to the most useful modern features in CSS and show how you can implement them today in your code base to improve scalability, maintainability, and productivity.

Learn more about the workshop!

Overview: 100 Days Of More Or Less Modern CSS