Breakpoint

Unified Javascript and SCSS breakpoint manager.

Installation

npm install @curiousmedia/breakpoint

Dart Sass

The Dart Sass implementation is highly recommend and used for all examples unless specified otherwise.

@use '@curiousmedia/breakpoint/src/breakpoint' with (
  $breakpoints: (
    md: "@media (hover: hover)"
  )
);

@include breakpoint.any('md') {
  .button {
    &:hover {
      color: red;
    }
  }
}

LibSass & Ruby Sass

@import '@curiousmedia/breakpoint/src/breakpoint';

$breakpoints: (
  md: "@media (hover: hover)"
);

@include breakpointAny('md') {
  .button {
    &:hover {
      color: red;
    }
  }
}

Usage

CSS

Breakpoint presets need to be configured by setting the "breakpoints" SCSS variable.

$breakpoints: (
    landscape: "@media (orientation: landscape)",
    touch: "@media screen and (pointer: coarse)",
    cursor: "@media screen and (pointer: fine)",
    hover: "@media screen and (hover: hover)",
    still: "@media screen and (prefers-reduced-motion)",
    sm: "@media (max-width: 640px)",
    md: "@media (min-width: 641px) and (max-width: 1024px)",
    lg: "@media (min-width: 1025px)",
    grid: "@supports (display: grid)",
    page: "@page"
);

Presents can be referenced for quick, unified breakpoints across an entire project. Unfortunately, CSS and Javascript breakpoints must be defined separately.

Single breakpoint

Create "md" breakpoint.

@include breakpoint.any(md) {
    div {
        font-size: 2em;
    }
}

Multiple breakpoints using any

Create breakpoint where sm or lg conditions are met.

@include breakpoint.any(sm, lg) {
    div {
        font-size: 2em;
    }
}

Multiple breakpoints using all

Create breakpoint where landscape and sm conditions are met. If all queries use the same rule (e.g. @media), then they will be merged into a single breakpoint. However, if multiple queries do not use the same rule, they will be nested.

@include breakpoint.all(landscape, sm) {
    div {
        font-size: 2em;
    }
}

Custom Breakpoints

Custom breakpoints can be used along side presets.

@include breakpoint.all(sm, '@media (min-width: 400px)') {
    div {
        font-size: 2em;
    }
}

Nested

Create nested breakpoints.

div {
  @include breakpoint.any(hover) {
    @include breakpoint.any(landscape, sm) {
      font-size: 2em;
    }
  
    @include breakpoint.all(md, grid) {
      font-size: 3em;
    }
  }
}

Short hand

Create single-property breakpoint.

div {
  @include breakpoint.prop('font-size', (lg: 1em, md: 2em));
}

Javascript

Breakpoint presets are configured when class is instantiated.

Configuration

let bp = new Breakpoint({
    'landscape': '@media (orientation: landscape)',
    'touch': '@media screen and (pointer: coarse)',
    'cursor': '@media screen and (pointer: fine)',
    'hover': '@media screen and (hover: hover)',
    'still': '@media screen and (prefers-reduced-motion)',
    'sm': '@media (max-width: 640px)',
    'md': '@media (min-width: 641px) and (max-width: 1024px)',
    'lg': '@media (min-width: 1025px)',
    'grid': '@supports (display: grid)',
    'page': "@page"
});

Single breakpoint

Query "md" breakpoint.

bp.any('md'); //returns true or false

Multiple breakpoints using any

Query to evaluate if "sm" or "lg" conditions are met.

bp.any('sm', 'lg'); //returns true or false

Multiple breakpoints using all

Query to evaluate if "landscape" and "sm" conditions are met.

bp.all('landscape', 'md'); //returns true or false

Custom Breakpoints

Custom breakpoints can be used along side presets.

bp.all('sm', '@media (min-width: 400px)'); //returns true or false

Notes

Complex queries

This library is designed to handle common media queries. Complex queries with many conditions and not operators have not been tested.

Supported rules

The @page, @media, and @supports rules are supported. Due to the nature of SCSS syntax, additional rules will have to be manually added.

@page

The @page rule will always return true in the Javascript implementation; Javascript isn't computed on printed pages.