Tags: buttons

22

sparkline

Sunday, July 5th, 2020

Dark Ages of the Web

Notes on the old internet, its design and frontend.

Saturday, May 30th, 2020

Programming CSS to perform Sass colour functions

I wrote recently about moving away from Sass to using native CSS features. I had this to say on the topic of mixins in Sass:

These can be very useful, but now there’s a lot that you can do just in CSS with calc(). The built-in darken() and lighten() mixins are handy though when it comes to colours.

I know we will be getting these in the future but we’re not there yet with CSS.

Anyway, I had all this in the back of my mind when I was reading Lea’s excellent feature in this month’s Increment: A user’s guide to CSS variables. She’s written about a really clever technique of combining custom properites with hsl() colour values for creating colour palettes. (See also: Una’s post on dynamic colour theming with pure CSS.)

As so often happens when I’m reading something written by Lea—or seeing her give a talk—light bulbs started popping over my head (my usual response to Lea’s knowledge bombs is either “I didn’t know you could do that!” or “I never thought of doing that!”).

I immediately set about implementing this technique over on The Session. The trick here is to use separate custom properties for the hue, saturation, and lightness parts of hsl() colour values. Then, when you want to lighten or darken the colour—say, on hover—you can update the lightness part.

I’ve made a Codepen to show what I’m doing.

Let’s say I’m styling a button element. I make custom propertes for hsl() values:

button {
  --button-colour-hue: 19;
  --button-colour-saturation: 82%;
  --button-colour-lightness: 38%;
  background-color: hsl(
    var(--button-colour-hue),
    var(--button-colour-saturation),
    var(--button-colour-lightness)
  );
}

For my buttons, I want the borders to be slightly darker than the background colour. When I was using Sass, I used the darken() function to this. Now I use calc(). Here’s how I make the borders 10% darker:

border-color: hsl(
  var(--button-colour-hue),
  var(--button-colour-saturation),
  calc(var(--button-colour-lightness) - 10%)
);

That calc() function is substracting a percentage from a percentage: 38% minus 10% in this case. The borders will have a lightness of 28%.

I make the bottom border even darker and the top border lighter to give a feeling of depth.

On The Session there’s a “cancel” button style that’s deep red.

Here’s how I set its colour:

.cancel {
  --button-colour-hue: 0;
  --button-colour-saturation: 100%;
  --button-colour-lightness: 40%;
}

That’s it. The existing button declarations take care of assigning the right shades for the border colours.

Here’s another example. Site admins see buttons for some actions only available to them. I want those buttons to have their own colour:

.admin {
  --button-colour-hue: 45;
  --button-colour-saturation: 100%;
  --button-colour-lightness: 40%;
}

You get the idea. It doesn’t matter how many differently-coloured buttons I create, the effect of darkening or lightening their borders is all taken care of.

So it turns out that the lighten() and darken() functions from Sass are available to us in CSS by using a combination of custom properties, hsl(), and calc().

I’m also using this combination to lighten or darken background and border colours on :hover. You can poke around the Codepen if you want to see that in action.

I love seeing the combinatorial power of these different bits of CSS coming together. It really is a remarkably powerful programming language.

Wednesday, February 19th, 2020

Slopes | Tinkersynth

Have fun with this little machine, tweaking the parameters for generating a Joy Division/Jocelyn Bell-Burnell data visualisation.

The interface is quite delightful!

Friday, February 14th, 2020

A Complete Guide to Links and Buttons | CSS-Tricks

Chris takes two side-by-side deep dives; one into the a element, the other into the button element.

Even if you think you already know those elements well, I bet there’ll be something new here for you. Like, did you know that the button element can have form over-riding attributes like formaction, formenctype, formmethod, formnovalidate, and formtarget?

Wednesday, May 22nd, 2019

Accessible Icon Buttons — Sara Soueidan – Freelance-Front-End UI/UX Developer

Sara runs through the many ways of providing an accessible name to an icon button, backed up with Scott’s testing.

Saturday, February 9th, 2019

Proper UI hierarchy · accssible

Bringing gradients back, baby!

This is going to be a handy reference to keep on hand whenever you want a button to actually look like a button.

Tuesday, January 22nd, 2019

What would a world without pushbuttons look like? | Aeon Essays

A history of buttons …and the moral panic and outrage that accompanies them.

By looking at the subtexts behind complaints about buttons, whether historically or in the present moment, it becomes clear that manufacturers, designers and users alike must pay attention to why buttons persistently engender critiques. Such negativity tends to involve one of three primary themes: fears over deskilling; frustration about lack of user agency/control; or anger due to perceptions of unequal power relations.

Sunday, September 30th, 2018

Control Panel

Analogue switches, dials, and buttons, buttons, buttons (just like that Flickr group I linked to).

Tuesday, August 21st, 2018

A Tale of Two Buttons

In defence of the cascade (especially now that we’ve got CSS custom properties).

I think embracing CSS’s cascade can be a great way to encourage consistency and simplicity in UIs. Rather than every new component being a free for all, it trains both designers and developers to think in terms of aligning with and re-using what they already have.

Remember, every time you set a property in CSS you are in fact overriding something (even if it’s just the default user agent styles). In other words, CSS code is mostly expressing exceptions to a default design.

Monday, July 23rd, 2018

On Designing and Building Toggle Switches

Sara shows a few different approaches to building accessible toggle switches:

Always, always start thinking about the markup and accessibility when building components, regardless of how small or simple they seem.

Thursday, May 31st, 2018

Design Patterns on CodePen

This ever-growing curated collection of interface patterns on CodePen is a reliable source of inspiration.

Friday, April 6th, 2018

Starability - Accessible rating system demo

Accessible star ratings (progressively enhanced from radio buttons) with lots of animation options. The code is on Github.

Tuesday, March 27th, 2018

Designing Button States - Cloud Four

The canonical example in just about every pattern library is documenting button variations. Here, Tyler shows how even this seemingly simple pattern takes a lot of thought.

Monday, May 1st, 2017

Control Panel | Flickr

Photos of analogue interfaces: switches, knobs, levers, dials, buttons, so many buttons.

Wednesday, November 23rd, 2016

Smithsonian 3D Apollo 11 Command Module

This is so wonderful! A 3D fly-through of the Apollo 11 command module, right in your browser. It might get your fan whirring, but it’s worth it.

Click through for lots of great details on the interface controls, like which kinds of buttons and switches were chosen for which tasks.

And there’s this lovely note scrawled near the sextant by Michael Collins (the coolest of all the astronauts):

Spacecraft 107, alias Apollo 11, alias ‘Columbia.’ The Best Ship to Come Down the Line. God Bless Her.

Monday, February 1st, 2016

Links, Buttons, Submits, and Divs, Oh Hell | Adrian Roselli

Use the right element for the job.

  • Does the Control Take Me to Another Page? Use an Anchor.
  • Does the Control Change Something on the Current Page? Use a Button.
  • Does the Control Submit Form Fields? Use a Submit.

Tuesday, February 10th, 2015

Responsible Social Share Links — Jonathan Suh

If you insist on having “social” sharing buttons, here’s a way to avoid bloating your page unnecessarily.

But you might want to reconsider whether you need them at all.

Thursday, October 16th, 2014

Replacing Radio Buttons Without Replacing Radio Buttons

A great technique from Heydon for styling radio buttons however you want.

Tuesday, August 6th, 2013

Tuesday, February 5th, 2013

You can’t create a button by Nicholas Zakas

Related to my rant on links that aren’t actually links: buttons that aren’t actually buttons.