CSS :placeholder-shown

By  on  

One of the first plugins that would hit a new framework in the early days of JavaScript frameworks was a placeholder plugin, which is why we were so excited when HTML5 brought us the placeholder attribute. Then CSS lovers like me were thrilled when the CSS spec allowed us to style placeholders.

One recent problem I faced was wanting to apply a specific font-family to an <input> element but only when that element contained text. My initial thought was needing to set the font-family on the <input> and then re-apply the body's font-family on the ::placeholder but that didn't seem ideal -- it seemed like a maintenance cost.

I took to Twitter for a better solution and luckily Facundo Corradini provided it: :placeholder-shown. The :placeholder-shown pseudo-clas targets an <input> element's placeholder only when it's shown, and thus I could select just the placeholder but not the input's text:

/* Applying style to input applies to both input text and placeholder */
input { color: red; }

/* Applying style *just* to placeholder */
input::placeholder { color: blue; }

/* Applying style to input when placeholder is shown */
input:placeholder-shown { color: yellow; }

/* Applying style to input but *not* placeholder */
input:not(:placeholder-shown) { color: green; }

:placeholder-shown is an awesome pseudo-selector that can be used to more effectively style placeholders and their elements depending on state. Creativity isn't just a design term -- it's a way of thinking for developers to solve interesting problems!

Recent Features

  • By
    CSS Animations Between Media Queries

    CSS animations are right up there with sliced bread. CSS animations are efficient because they can be hardware accelerated, they require no JavaScript overhead, and they are composed of very little CSS code. Quite often we add CSS transforms to elements via CSS during...

  • By
    Create Namespaced Classes with MooTools

    MooTools has always gotten a bit of grief for not inherently using and standardizing namespaced-based JavaScript classes like the Dojo Toolkit does.  Many developers create their classes as globals which is generally frowned up.  I mostly disagree with that stance, but each to their own.  In any event...

Incredible Demos

  • By
    CSS Counters

    Counters.  They were a staple of the Geocities / early web scene that many of us "older" developers grew up with;  a feature then, the butt of web jokes now.  CSS has implemented its own type of counter, one more sane and straight-forward than the ole...

  • By
    Redacted Font

    Back when I created client websites, one of the many things that frustrated me was the initial design handoff.  It would always go like this: Work hard to incorporate client's ideas, dream up awesome design. Create said design, using Lorem Ipsum text Send initial design concept to the client...

Discussion

  1. Todd

    Have I missed something? It seems that styling the colour of a placeholder can be done simply with ::placeholder, because you’re only styling the placeholder it’s self. SO when the placeholder isn’t shown, the colour won’t be seen, because it’s just the colour of the placeholder. If you wanted to apply a different border colour on the input only when the placeholder is visible, you would use ::placeholder-shown.

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!