Wrapping Code Samples on Mobile Devices

By  on  

One part of being a technical blogger that I've had to come to grips with is code samples and small mobile device screens.  I was amazed when I saw a double-digit percentage of visits to this blog were from mobile phones -- mental!  I started paying more attention to detail on said devices and I realized that code samples required loads of horizontal scrolling:  yuck.  By utilizing CSS white-space, we can make code wrap and avoid arm-numbing scrolling on small screens:

pre {
	white-space: pre-line;
}

I like using PrismJS so that requires a different selector:

pre[class*='language-'], code[class*='language-'] {
	white-space: pre-line;
}

Thankfully white-space lets me help you all avoid horizontal scrolling on mobiles. Of course you'll need to choose which media query you want to apply that to, but I'll let you do that.  In some cases it may be difficult to read the line-broken code, but that's surely better than all that crazy scrolling.

Recent Features

  • By
    Vibration API

    Many of the new APIs provided to us by browser vendors are more targeted toward the mobile user than the desktop user.  One of those simple APIs the Vibration API.  The Vibration API allows developers to direct the device, using JavaScript, to vibrate in...

  • By
    Responsive and Infinitely Scalable JS Animations

    Back in late 2012 it was not easy to find open source projects using requestAnimationFrame() - this is the hook that allows Javascript code to synchronize with a web browser's native paint loop. Animations using this method can run at 60 fps and deliver fantastic...

Incredible Demos

  • By
    PHP IMDB Scraper

    It's been quite a while since I've written a PHP grabber and the itch finally got to me. This time the victim is the International Movie Database, otherwise known as IMDB. IMDB has info on every movie ever made (or so it seems). Their...

  • By
    MooTools Image Preloading with Progress Bar

    The idea of image preloading has been around since the dawn of the internet. When we didn't have all the fancy stuff we use now, we were forced to use ugly mouseover images to show dynamism. I don't think you were declared an official...

Discussion

  1. I’m also using PrismJS. Any tips to get the line-numbers to adjust?

  2. Also, by default tab size is about 4 i believe, this snippet brings it back a little…

    // @media query here for small screens...
    pre{
          webkit-tab-size: 2;
          -moz-tab-size: 2;
          -ms-tab-size: 2;
          -o-tab-size: 2;
          tab-size: 2;
    }
    

    That is, assuming you’ve got tabs over spaces (which you should of course).

  3. Interesting post. I have thought about this for quite some time. The thing is that code is much more readable, in my opinion, when not wrapping it like this.

    Since we are used to large screens, reading wrapped code like this is hard and unfamiliar. We do not code on small screens and therefor it makes more sense to scroll horizontally when viewing code then to force line breaking/wrapping.

  4. No offense, but I would rather go with all the crazy scrolling. I honestly think it looks nicer than the broken up code, and it is easier to read and understand code samples.

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