CSS user-select

By  on  

In my quest to contribute to every Mozilla project possible, I spent some time last Friday making updates to Firefox DevTools.  The JSON Viewer component needed some love so that was first on my list.  While viewing the CSS for the JSON Viewer component, I saw something I hadn't recognized:  CSS user-select:

.heading {
  -moz-user-select: none; /* don't allow selection */
}

After a bit of research, I found that you can control what content can be is selected using CSS:

  .dont-select {
    user-select: none;
  }

  .control-select {
    user-select: none; /* don't select anything */
    user-select: auto; /* let the browser decide */
    user-select: all; /* select everything */
    user-select: text; /* select only text */
    user-select: contain; /* selection contained within element bounds */
  }

When I think about it, there's certainly an argument to be made that you'd prefer some content be selected and copied and others content not, like advertisements or images.

This falls into the family of CSS pointer-events where CSS is used for something other than display.  My first thought is that selection preference should be done via a HTML attribute, like autocomplete and autocorrect are.  Anyways, give the demo a roll!

Recent Features

  • 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...

  • By
    5 More HTML5 APIs You Didn’t Know Existed

    The HTML5 revolution has provided us some awesome JavaScript and HTML APIs.  Some are APIs we knew we've needed for years, others are cutting edge mobile and desktop helpers.  Regardless of API strength or purpose, anything to help us better do our job is a...

Incredible Demos

  • By
    Introducing MooTools ScrollSide

    This post is a proof of concept post -- the functionality is yet to be perfected. Picture this: you've found yourself on a website that uses horizontal scrolling instead of vertical scrolling. It's an artistic site so you accept that the site scrolls left to right.

  • By
    MooTools Font-Size Scroller with Cookie Save

    Providing users as many preferences as possible always puts a smile on the user's face. One of those important preferences is font size. I can see fine but the next guy may have difficulty with the font size I choose. That's why...

Discussion

  1. MaxArt

    Been using that for a while – obviously, the most common usage is none.
    It’s odd it’s still not been finalized and it’s been used like this for *several years* already, still with vendor prefixes and all.

  2. user-select: contain; seems like it could come in handy and it would be easier to change the values via CSS than everywhere in the markup. Support isn’t too shabby either…

    http://caniuse.com/#search=user-select

    I enjoyed the demos. Thanks for sharing.

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