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@fiad/stitchery

A sharp collection of SCSS utilities


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Installation

npm i @fiad/stitchery

Usage

/* main.scss */
@import '@fiad/stitchery';

Functions list

map-get-default

A simple high order function that wraps map-get but returns a fallback value instead of null when the map does not have a value associated with the key being searched.

Definition:

map-get-default($map, $key, $default)

Usage:

color: map-get-default($colors, 'white', '#FFFFFF');

map-get-recursive

It provides a recursive version of map-get that allows you to perform a deep-search over the map.

Definition:

map-get-recursive($map, $keys...)

Usage:

color: map-get-recursive($theme, 'colors', 'primary');

rem

It provides a px to rem conversion.

Definition:

rem($px, $context, $threshold)
Argument Type Description Default
$px number The size to be converted from px to rem. -
$context number The conversion unit, i.e. the amount of pixels equivalent to the base value (1) of the target unit. 16px
$threshold number The limit below which the conversion is ignored in order to prevent rendering issues due to subpixels division. 2px

Basic usage:

font-size: rem(18px);

Advanced usage:

padding: rem(12px 16px);
box-shadow: rem(0 4px 10px rgba(0, 0, 0, 0.25));

str-replace

It provides a simple string replacement.

Definition:

str-replace($string, $search, $replacement)

Basic usage:

background-image: url('#{str-replace($imageUrl, 'http:', '')}');

Advanced usage (multiple entries):

background-image: url('#{str-replace($imageUrl, ('https:', 'http:'), '')}');

strip-unit

It strips unit from the given value.

Definition:

strip-unit($value)

Usage:

$someSize: 512px;

strip-unit($someSize) // 512

Mixin list

aspect-ratio

It provides a set of rules that preserves the original aspect ratio of an element while it's scaled according to the sizes of a parent container.

.video {
  @include aspect-ratio(16, 9); // using well-known lowest terms
}

.image {
  @include aspect-ratio(480, 320); // using explicit sizes
}

atomic-helpers

It generates a set of functional CSS classes.

Definition:

@mixin atomic-helpers($base-class, $specs);

Usage:

SCSS:

@include atomic-helpers("m", (
  "property": (
    "_": "margin",        // .m-
    "t": "margin-top",    // .mt-
    "r": "margin-right",  // .mr-
    "b": "margin-bottom", // .mb-
    "l": "margin-left"    // .ml-
  ),
  "value": (
    "0": 0,               // .m[property]-0
    "1": 8px,             // .m[property]-1
    "2": 16px,            // .m[property]-2
    "3": 24px,            // .m[property]-3
    "4": 32px,            // .m[property]-4
    "5": 40px,            // .m[property]-5
    "6": 48px,            // .m[property]-6
    "7": 56px,            // .m[property]-7
    "8": 64px             // .m[property]-8
  ),
  "breakpoints": (
    "sm",                 // .sm:m[property]-[value]
    "md",                 // .md:m[property]-[value]
    "lg"                  // .lg:m[property]-[value]
  )
));

⚠️ Notice: the keys listed by the "breakpoints" property refer to the ones defined in a global $breakpoints variable, that is supposed to be a map containing a key-value entry for each breakpoint handled in your project. By the way, the atomic-helpers mixin comes along with a default value for that variable, corresponding to the following:

$breakpoints: (
 "sm": 768,
 "md": 1024,
 "lg": 1366
);

In order to use different breakpoint values and/or different prefixes for the generated selectors, overwrite it according to your needs.

HTML:

<h1 class="m-2">Title</h1>
<p class="mt-6 sm:mt-4 md:mt-3 lg:mt-2">Lorem ipsum</p>

CSS OUTPUT:

.m-0 {
  margin: 0;
}
/* [...] */
.m-8 {
  margin: 64px;
}
.mt-0 {
  margin-top: 0;
}
/* [...] */
.mt-8 {
  margin-top: 64px;
}
/* [...] */
@media screen and (min-width: 768px) {
  .sm\:m-0 {
    margin: 0;
  }
  /* [...] */
  .sm\:m-8 {
    margin: 64px;
  }
}
/* [...] */

auto-scaling

It provides an auto-scaling system based on relative units.

Definition:

@include auto-scaling($naturalMobileSize, $naturalTabletSize, $naturalDesktopSize, $mobileBreakpoints, $tabletBreakpoints, $desktopBreakpoints);
Argument Description Default
$naturalPhoneSize The width of the given phone layout (.psd, .sketch, etc). 375
$naturalTabletSize The width of the given tablet layout (.psd, .sketch, etc). 768
$naturalDesktopSize The width of the given desktop layout (.psd, .sketch, etc). 1440
$phoneBreakpoints The phone breakpoints to be handled. (320, 360, 375, 414)
$tabletBreakpoints The tablet breakpoints to be handled. (600, 768, 800, 962)
$desktopBreakpoints The desktop breakpoints to be handled. (1024, 1152, 1280, 1366, 1440, 1536, 1600, 1920)

Usage:

SCSS:

html {
  @include auto-scaling();
}

.container {
  max-width: 80rem; // this size will proportionally scale across the defined breakpoints
}

CSS OUTPUT:

@media screen and (min-width: 320px) {
  html {
    font-size: 85%;
  }
}

@media screen and (min-width: 360px) {
  html {
    font-size: 96%;
  }
}

@media screen and (min-width: 375px) {
  html {
    font-size: 100%;
  }
}

@media screen and (min-width: 414px) {
  html {
    font-size: 110%;
  }
}

@media screen and (min-width: 600px) {
  html {
    font-size: 78%;
  }
}

@media screen and (min-width: 768px) {
  html {
    font-size: 100%;
  }
}

@media screen and (min-width: 800px) {
  html {
    font-size: 104%;
  }
}

@media screen and (min-width: 962px) {
  html {
    font-size: 125%;
  }
}

@media screen and (min-width: 1024px) {
  html {
    font-size: 71%;
  }
}

@media screen and (min-width: 1152px) {
  html {
    font-size: 80%;
  }
}

@media screen and (min-width: 1280px) {
  html {
    font-size: 88%;
  }
}

@media screen and (min-width: 1366px) {
  html {
    font-size: 94%;
  }
}

@media screen and (min-width: 1440px) {
  html {
    font-size: 100%;
  }
}

@media screen and (min-width: 1536px) {
  html {
    font-size: 106%;
  }
}

@media screen and (min-width: 1600px) {
  html {
    font-size: 111%;
  }
}

@media screen and (min-width: 1920px) {
  html {
    font-size: 133%;
  }
}

How it works:

The mixin generates a font-size rule for each defined breakpoint, setting a proportional percentage value compared to the given natural one (phone, tablet, or desktop, according to the current viewport width). This way, a proportional font-size context is created and it's possible to auto-scale elements sizes by simply using relative units.

It's highly recommended to implement a unique global auto-scaling context by appending the mixin directly to the html styles and by setting all DOM elements width, height, paddings, margins, and other sizes in rem. However, if for any reason a specific application's part only is required to be auto-scaled, you can also create a "local" auto-scaling context by just applying the mixin to the target wrapper and by setting all its children sizing and spacing values in em.

⚠️ Notice: since the mixin widely uses the font-size rule, pay attention when styling typography if you choose a "local" context approach. In this case, try to apply typographic rules as deeply as possible, avoiding parent styles inheriting.

💡 Tips: since px-to-(r)em conversion may produce many decimal places and the auto-scaling system is based on percentage values, you may encounter some rendering issues due to subpixel division. This usually happens when dealing with odd values or trying to scale too small values. As a best practice, try to round sizes to powers of 2, expecially for horizontal dimensions (e.g. margin, padding, width, etc), and avoid to scale sizes lower than 4px, including borders.

container

It provides a basic container styles for boxed layouts.

Definition:

container($maxWidth, $padding)
Argument Description Default
$maxWidth The maximum container size. 80rem
$padding The container horizontal padding, i.e. its lateral safe area. 0

Usage:

SCSS:

.container {
  @include container();
}

HTML:

<div class="container">
  <!-- content -->
</div>

off-container

It provides a utility to prevent inheritance of containment styles within a container, i.e. it allows you to keep the content full-width while still being wrapped by the container.

Definition:

off-container()

Usage:

SCSS:

.off-container {
  @include off-container();
}

HTML:

<div class="container">
  <!-- boxed content -->
  <div class="off-container">
    <!-- full-width content -->
  </div>
</div>

grid

It provides a simple grid system.

Definition:

grid($columns, $gap, $flex)
Argument Description Default
$columns The grid size, i.e. the number of column subdivisions. 12
$gap The gap between columns and rows. 1rem
$flex If true, the implementation will be based on Flexbox instead of CSS Grid. false

Usage:

SCSS:

@include grid();

HTML:

<div class="row">
  <!--
    12 columns cells under 768px
    6 columns cells under 1024px
    4 columns cells under 1366px
    3 columns cells from 1366px
  -->
  <div class="col sm:span-6 md:span-4 lg:span-3"></div>
  <div class="col sm:span-6 md:span-4 lg:span-3"></div>
  <div class="col sm:span-6 md:span-4 lg:span-3"></div>
  <div class="col sm:span-6 md:span-4 lg:span-3"></div>
</div>
<div class="row">
  <!--
    12 columns cell under 1024px
    10 columns cell with 1 column offset under 1366px
    8 columns cell with 2 columns offset from 1366px
  -->
  <div class="col md:span-10 md:start-2 lg:span-8 lg:start-3"></div>
</div>

⚠️ Notice: the keys used as class prefixes for the breakpoint-targeted properties (sm, md, lg) refer to the ones defined in a global $breakpoints variable, that is supposed to be a map containing a key-value entry for each breakpoint handled in your project. By the way, the grid mixin comes along with a default value for that variable, corresponding to the following:

$breakpoints: (
 "sm": 768,
 "md": 1024,
 "lg": 1366
);

In order to use different breakpoint values and/or different prefixes for the generated selectors, overwrite it according to your needs.

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