Tags: sizes

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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.

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 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.