@univers-agency/europacss v0.6.0

EuropaCSS originally began as a collection of SASS mixins and functions that came in handy when working with design agencies that had very specific designs over different breakpoints. These design systems translate pretty well to configurations and allows weeding out a lot of the boilerplate involved.

USAGE WITH WEBPACK

Example postcss.config.js:

module.exports = {
  plugins: [
    require('postcss-easy-import')({
      prefix: '_',
      extensions: ['pcss', 'scss', 'css'],
      plugins: [
        require('stylelint')
      ]
    }),
    require('@univers-agency/europacss'),
    require('autoprefixer')({ grid: 'on' }),
    require('css-mqgroup')({ sort: true }),
    require('postcss-reporter')({ clearReportedMessages: true, throwError: false })
  ]
}

NOTES

• Remember to keep your @import statements at the top of your .pcss file
• Add

@europa arrows;
@europa base;

to your main stylesheet

CONFIG

TODO

Typography

Sizes

typography sizes size_name breakpoint_name: value

Examples

A regular setup:

  typography: {
    sizes: {
      base: {
        mobile: '16px'
      }
    }
  }

If value is an object, all properties will be added to the selector, i.e:

  typography: {
    sizes: {
      base: {
        mobile: {
          'font-size': '16px',
          'line-height': 1.25
        }
      }
    }
  }

AT-RULES

todo

@responsive {breakpointQuery} {block}

EXAMPLE:

@responsive desktop_md {
  display: none;
}

@responsive <=ipad_portrait {
  color: red;
}

@color {fg/bg} {colorName}

Gets colorName from theme.colors

EXAMPLE:

h2 {
  @color fg headings.h2;
}

@grid

Sets column gap to your gutter configuration across all breakpoints.

EXAMPLE:

.my-grid {
  @grid;
  grid-template-areas: "a b"
                       "a c";
  grid-template-columns: 6fr 6fr;

  .a {
    grid-area: a;
  }

  .b {
    grid-area: b;
  }

  .c {
    grid-area: c;
  }
}

This creates a 6 columns wide stacking grid.

@row [childrenPerRow[/wrapModifier][/verticalGap]] [breakpointQuery]

Spaces children correctly per row. Does not set child widths/columns! If no params are given, only the first child gets a margin-left of 0.

wrapModifier defaults to nowrap. verticalGap defaults to nothing.

EXAMPLE:

.row {
  @row 3/wrap;

  .child {
    @column 4/12;
  }
}

/* to apply the `sm` spacing as margin-top for every child, except the 3 first: */
.row {
  @row 3/wrap/sm;

  .child {
    @column 4/12;
  }
}

`@embed-responsive {aspectRatio}

PARAMS:

{aspectRatio}

• 16/9

@space {decl} {sizeQuery} [breakpointQuery]

PARAMS:

{decl}

• margin-x, margin-y, padding-x, padding-y
• translateX, translateY, translateZ, scale
• Any prop that accepts the values you give it.

{sizeQuery}

• xs > Gets XS from theme.spacing map.
• 2 > Gets 2 times the gutter padding.
• 1/3 > Calcs a fraction.
• 3:1/6 > Calcs a 3/6 fraction but with 1 added gutter unit
• xs/2 > Gets half of the XS from theme.spacing map.
• between(20px-50px) > Scales the value from 20px at the start of breakpoint to 50px at the end of breakpoint.
• container > Gets value from theme.container.padding for breakpoint.
• -container > Gets negative value of theme.container.padding for breakpoint.
• vertical-rhythm(theme.typography.sizes.xl) > Grabs object for breakpoint and multiplies with default line-height.
• vertical-rhythm(theme.typography.sizes.xl, 1.2) > Grabs object for breakpoint and multiplies with 1.2 as line-height.
• calc(100vw - var[container] + var[1]) > Switches out var[container] and var[1] with correct values for container padding and 1 gutter unit per breakpoint.

EXAMPLES:

.block {
  @space margin-y xl/2;

  &:first-of-type {
    @space margin-top xl;
  }

  &:last-of-type {
    @space margin-bottom: xl;
  }
}

.powerful-stuff {
  /* move element 4 columns + a gutter size to the left */
  @space translateX calc(var[4:1/12] * -1);
}

If you need the set properties to be marked as !important you can use @space!

  @space! margin-left xs;

@font {fontFamily} [fsQuery]

Selects a font family. Can also be passed a font size query.

PARAMS:

{fontFamily}

• picks fontFamily from typography.families

[fsQuery]

• can also be passed. Will then create a @fontsize rule with fsQuery as params

@fontsize {fsQuery} [breakpointQuery]

PARAMS:

{fsQuery}

• lg > Picks the lg key from theme.typography.sizes across breakpoints
• lg/2.0 > Also sets line-height to 2.0
• lg(2.0)/2.0 > Adds a modifier (2.0) that gets used as a multiplier in a calc() for the final font-size.
• between(18px-22px) > Responsive font sizing, from 18px to 22px. Needs a breakpoint to function properly.
• product.size > Traverses the keypath product.size within theme.typography.sizes

[breakpointQuery]

• xs > Only for the xs breakpoint
• >=md > Only for larger or equal to md

@if {value} {block}

Renders {block} if {value} is true. Ignores it otherwise.

PARAMS:

{value}

• theme.typography.optimizeLegibility > Checks value in theme config.

EXAMPLES:

@if theme.typography.optimizeLegibility {
  article {
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
}

@column {sizeQuery} [breakpointQuery]

Creates a flex column inside rule.

PARAMS:

{sizeQuery}

• 1/3 > Takes up one third of container, across all breakpoints
• 3:1/6 > Takes up one third of container, across all breakpoints, with 1 unit of gutter
• calc(var[container] + var[6/12]) > 6/12 columns + width of container gutter

[breakpointQuery]

• xs > For xs breakpoint only
• xs/sm/xl > For xs, sm and xl breakpoints
• <=md > Less and equal to the md breakpoint

EXAMPLES:

article {
  @column 1/3;
  @column 3/3 xs;
}
/* Column is 1/3 wide on all devices, except xs, which is 3/3. */

@iterate {iterable} block

Iterates through a config object.

PARAMS:

{iterable}

• a path in the theme.object, I.E theme.header.padding.small

EXAMPLES:

article {
  @iterate theme.header.padding.small {
    @responsive $key {
      padding-top: $value;
      padding-bottom: $value;
    }
  }
}

This creates a media query for each key in theme.header.padding.small

@unpack {object}

Unpacks a config object.

PARAMS:

{object}

• a path in the theme object, I.E theme.typography.sections.navigation

EXAMPLES:

article {
  @unpack theme.typography.sections.navigation;
}

results in

  @media (min-size: 0) and (max-size: 749px) {
    article {
      font-size: 1.2rem;
      line-height: 1.6;
    }
  }

  @media (min-size: 750px) and (max-size: 1039px) {
    article {
      font-size: 1.4rem;
      line-height: 1.5;
    }
  }

  /* ... */

POSTCSS PLUGINS IN USE

This would not be possible without the following great plugins:

• postcss-extend-rule
• postcss-functions
• postcss-nested