Tags: size



AddyOsmani.com - Start Performance Budgeting

Great ideas from Addy on where to start with creating a performance budget that can act as a red line you don’t want to cross.

If it’s worth getting fast, it’s worth staying fast.

When 7 KB Equals 7 MB - Cloud Four

I remember Jason telling me about this weird service worker caching behaviour a little while back. This piece is a great bit of sleuthing in tracking down the root causes of this strange issue, followed up with a sensible solution.

Pixels vs. Ems: Users DO Change Font Size – Evan Minto – Medium

I have to admit, I didn’t realise that text reszing behaved differently for user preferences compared to page zoom. For that reason alone, I’m going to avoid setting font sizes in pixels.

If 2 to 3% (or more!) of your users are relying on a custom font size, you should know that so you can either support that user preference or make a conscious decision to not support it. Doing anything less is frankly irresponsible, especially considering that users with larger font sizes may be using those sizes to compensate for visual disabilities.

Swapping Images with the Sizes Attribute | Filament Group, Inc., Boston, MA

The hits just keep on coming from the Filament Group. Here Scott shares a really clever technique for creating an image magnifier using the sizes attribute of the img element.

Responsive Components: a Solution to the Container Queries Problem — Philip Walton

Here’s a really smart approach to creating container queries today—it uses ResizeObserver to ensure that listening for size changes is nice and performant.

There’s a demo site you can play around with to see it in action.

While the strategy I outline in this post is production-ready, I see us as being still very much in the early stages of this space. As the web development community starts shifting its component design from viewport or device-oriented to container-oriented, I’m excited to see what possibilities and best practices emerge.

The Equilateral Triangle of a Perfect Paragraph | Better Web Type

This is a fun game (I scored a measly 73/100). The idea is to develop a feeling for the balance between font-size, line-height, and line length …just like the three sides of an equilateral triangle.

Too many of them still set line-height, font size and line width as independent features when in fact they should all be considered together. The equilateral triangle is a perfect representation of how the three features work in harmony.

Saving you bandwidth on Google+ through machine learning

This is an interesting use of voodoo magic (or “machine learning” as we call it now) by Google to interpolate data in a small image to create a larger version. A win for performance.

Web Bloat Score Calculator

Here’s an interesting metric for measuring performance: take the overall page weight of a URL and divide it by the file size of the screenshot of that URL.


A lovely hack from Science Hack Day San Francisco: get an idea of the size of CERN’s Large Hadron Collider by seeing it superimposed over your town.

Keep ’em Separated — ericportis.com

I share the concerns expressed here about the “sizes” attribute that’s part of the new turbo-powered img element (or “the picture element and its associates”, if you prefer). Putting style or layout information into HTML smells bad.

This is a concern that Matt Wilcox has raised:

Change the design and those breakpoints are likely to be wrong. So you’ll need to change all of the client-side mark-up that references images.

I can give you a current use-case: right here on adactio.com, you can change the stylesheet …so I can’t embed breakpoints or sizes into my img elements because—quite rightly—there’s a separation between the structural HTML layer and the presentational CSS layer.

» Don’t use <picture> (most of the time) Cloud Four Blog

Jason points out that the picture element might not be needed for most responsive image use cases; the srcset and sizes attributes will probably be enough—that’s what I’m doing for the photos on my site.

Responsive design testing tool – Viewport Resizer

A handy little bookmarklet for quickly checking how a site might look at different screen sizes, and you can customise it to use whichever screen sizes you like.

Responsive typography demo

This is a pretty wacky experiment in altering font size based on the user’s distance from the screen (allow the page to access your camera and enable the “realtime” option for some real fun). I don’t know how much real-world application this has, but it’s a cute’n’fun exercise.

JPEGmini - Your Photos on a Diet!

This looks like a really handy tool for reducing the file size of JPEGs without any perceptible loss of quality (in much the same way that ImageOptim works for PNGs)—available as a Mac app or an installable web service.

Sizing with CSS3’s vm and vh units - Snook.ca

Once again I’m getting all my CSS3 information from Jonathan. This time he’s discovered the vw and vh units which allow you to specify sizes relative to the size of the viewport.

Responsive Design Testing

Another browser-based tool for viewing the same site at different sizes, but this one displays them all the same time, side by side.

ProtoFluid. Rapid Prototyping of Adaptive CSS and Responsive Design.

Another browser-based tool for testing your responsive designs at different screen sizes.

responsivepx - find that tricky breakpoint

Remy created this tool for resizing a viewport to figure out where to put the breakpoints in your media queries.

Screenfly by QuirkTools — Test Your Website at Different Screen Resolutions

A handy little service for viewing sites at different dimensions. Just be aware that it doesn’t actually emulate different devices.

Font sizing with rem - Snook.ca

Well, ya learn something new every day …or at least I did. I had no idea about the rem unit—relative em—for font-sizing in CSS.