diff --git a/.travis.yml b/.travis.yml index dca57bc..6afa3d3 100644 --- a/.travis.yml +++ b/.travis.yml @@ -1,10 +1,9 @@ language: node_js node_js: - - "4" - - "6" - "8" - "9" - "10" + - "11" before_install: - rvm install 2.2.2 - npm i npx diff --git a/README.md b/README.md index ea933c7..fc35b66 100644 --- a/README.md +++ b/README.md @@ -1,8 +1,8 @@ -# Media Queries with superpowers [![Build Status](https://api.travis-ci.org/mcaskill/sass-mq.svg?branch=master)](https://travis-ci.org/mcaskill/sass-mq) +
+ Awesome +
-![ ](https://raw.githubusercontent.com/mcaskill/sass-mq/master/icon.png) - ----- +# Media Queries with superpowers [![Build Status](https://api.travis-ci.org/mcaskill/sass-mq.svg?branch=master)](https://travis-ci.org/sass-mq/sass-mq) **`mq()`+** is a [Sass](http://sass-lang.com/ "Sass - Syntactically Awesome Stylesheets") library that helps you compose media queries in an elegant way. @@ -67,18 +67,18 @@ Compiles to: } ``` ----- - +_Sass MQ was crafted in-house at the Guardian. Today, many more companies and developers are using it in their projects: [see who uses Sass MQ](#who-uses-sass-mq)._ ## How to use it _The original `mq()` can be played with on [SassMeister](http://sassmeister.com/): `@import 'mq';`._ -1. Install with [Bower](http://bower.io/ "Bower: A package manager for the web"): `bower install mcaskill-sass-mq --save` - - OR Install with [npm](https://www.npmjs.com/): `npm install @mcaskill/sass-mq --save` _it supports [eyeglass](https://github.com/sass-eyeglass/eyeglass)_ +1. Install: + - with [Bower](http://bower.io/ "Bower: A package manager for the web"): `bower install mcaskill-sass-mq --save` + - with [npm](https://www.npmjs.com/): `npm install @mcaskill/sass-mq --save` _supports [eyeglass](https://github.com/sass-eyeglass/eyeglass)_ + - with [yarn](https://www.yarnpkg.com/): `yarn add @mcaskill/sass-mq` _supports [eyeglass](https://github.com/sass-eyeglass/eyeglass)_ - OR [Download _mq.scss](https://raw.github.com/mcaskill/sass-mq/master/_mq.scss) to your Sass project. + OR [Download _mq.scss](https://raw.github.com/mcaskill/sass-mq/master/_mq.scss) into your Sass project. 2. Import the partial in your Sass files and override default settings with your own preferences before the file is imported: @@ -105,17 +105,20 @@ _The original `mq()` can be played with on [SassMeister](http://sassmeister.com/ // Define the breakpoint from the $mq-breakpoints list that should // be used as the target width when outputting a static stylesheet - // (i.e. when $mq-responsive is set to 'false'). + // (when $mq-responsive is set to 'false'). $mq-static-breakpoint: desktop; // If you want to display the currently active breakpoint in the top // right corner of your site during development, add the breakpoints - // to this list, ordered by width, e.g. (mobile, tablet, desktop). + // to this list, ordered by width. For example: (mobile, tablet, desktop). $mq-show-breakpoints: (mobile, mobileLandscape, tablet, desktop, wide); + // If _mq.scss is in your project: @import 'path/to/mq'; // With eyeglass: - // @import 'sass-mq'; + @import '@mcaskill/sass-mq'; + // With webpack (and boilerplates such as create-react-app) + @import '~@mcaskill/sass-mq'; ``` 3. Play around with `mq()` (see below) @@ -203,7 +206,7 @@ $mq-static-breakpoint: desktop; ### Verbose and shortand notations -Sometimes you’ll want to be extra verbose (e.g. if you’re developing a +Sometimes you’ll want to be extra verbose (for example, if you’re developing a library based on top of sass-mq), however for readability in a codebase, the shorthand notation is recommended. @@ -305,7 +308,12 @@ be a list of the breakpoints you want to debug, ordered by width. The name of the active breakpoint and its pixel and em values will then be shown in the top right corner of the viewport. -![$mq-show-breakpoints](https://raw.githubusercontent.com/mcaskill/sass-mq/master/show-breakpoints.gif) +```scss +// Adapt the list to include breakpoint names from your project +$mq-show-breakpoints: (phone, phablet, tablet); +``` + +![$mq-show-breakpoints](https://raw.githubusercontent.com/sass-mq/sass-mq/master/show-breakpoints.gif) ## Running tests diff --git a/_mq.scss b/_mq.scss index 9fb2191..8f47c1d 100644 --- a/_mq.scss +++ b/_mq.scss @@ -2,6 +2,12 @@ // See https://github.com/sass-mq/sass-mq/pull/10 /// Base font size on the `` element +/// +/// Do not override this value, or things will break +/// +/// @link https://github.com/sass-mq/sass-mq/issues/122 +/// @deprecated This setting will be removed in sass-mq v6.0.0 +/// @access private /// @type Number (unit) $mq-base-font-size: 16px !default; @@ -48,7 +54,7 @@ $mq-breakpoints: ( /// // tablet-only.scss /// // /// // Ignore all styles above tablet breakpoint, -/// // and fix the styles (e.g. layout) at tablet width +/// // and fix the styles (such as the layout) at tablet width /// $mq-responsive: false; /// $mq-static-breakpoint: tablet; /// @import 'main'; // @media queries in this file will be rasterized up to tablet @@ -62,12 +68,16 @@ $mq-static-breakpoint: desktop !default; /// /// If you want to display the currently active breakpoint in the top /// right corner of your site during development, add the breakpoints -/// to this list, ordered by length, e.g. (mobile, tablet, desktop). +/// to this list, ordered by length. For example: (mobile, tablet, desktop). +/// +/// @example scss +/// $mq-show-breakpoints: (mobile, tablet, desktop); +/// @import 'path/to/mq'; /// /// @type map $mq-show-breakpoints: () !default; -/// Customize the media type (e.g. `@media screen` or `@media print`) +/// Customize the media type (for example: `@media screen` or `@media print`) /// By default sass-mq uses an "all" media type (`@media all and …`) /// /// @type String @@ -77,7 +87,7 @@ $mq-media-type: all !default; /// Convert pixels to ems /// /// @param {Number} $px - value to convert -/// @param {Number} $base-font-size ($mq-base-font-size) - `` font size +/// @ignore @param {Number} $base-font-size [$mq-base-font-size] - `` font size (deprecated) /// /// @example scss /// $font-size-in-ems: mq-px2em(16px); @@ -86,6 +96,12 @@ $mq-media-type: all !default; /// @requires $mq-base-font-size /// @returns {Number} @function mq-px2em($px, $base-font-size: $mq-base-font-size) { + @if ($mq-base-font-size != 16px) { + @warn "Overriding $mq-base-font-size will break things, see https://github.com/sass-mq/sass-mq/issues/122."; + } + @if ($base-font-size != 16px) { + @warn "The $base-font-size argument will be removed in sass-mq v6.0.0, as overriding it breaks things, see https://github.com/sass-mq/sass-mq/issues/122."; + } @if unitless($px) { @warn "Assuming #{$px} to be in pixels, attempting to convert it into pixels."; @return mq-px2em($px * 1px, $base-font-size); @@ -117,8 +133,8 @@ $mq-media-type: all !default; /// Parse a breakpoint /// /// @param {String | Number} $value - Length of the breakpoint. One of $breakpoints -/// @param {Boolean} $exclusive (false) - Should the value be an exclusive boundary -/// @param {Map} $breakpoints ($mq-breakpoints) - Map of breakpoints +/// @param {Boolean} $exclusive [false] - Should the value be an exclusive boundary +/// @param {Map} $breakpoints [$mq-breakpoints] - Map of breakpoints /// /// @example scss /// @media (min-width: mq-parse-breakpoint(380px)) {} @@ -142,7 +158,7 @@ $mq-media-type: all !default; /// @ignore Documentation: http://sassylists.com/documentation.html#sl-to-string /// /// @param {List} $list - list to cast -/// @param {String} $glue (' and ') - value to use as a join string +/// @param {String} $glue [' and '] - value to use as a join string /// /// @example scss /// mq-stringify(a b c) @@ -171,16 +187,16 @@ $mq-media-type: all !default; /// /// Computes a media query based on a list of conditions. /// -/// @param {String | Boolean} $from (false) - One of $mq-breakpoints -/// @param {String | Boolean} $until (false) - One of $mq-breakpoints -/// @param {String | Boolean} $and (false) - Additional media query parameters -/// @param {String | Boolean} $or (false) - Alternative media query parameters -/// @param {String} $media-feature (width) - Media feature: width or height of the output device's rendering surface -/// @param {String} $media-type ($mq-media-type) - Media type: screen, print… +/// @param {String | Boolean} $from [false] - One of $mq-breakpoints +/// @param {String | Boolean} $until [false] - One of $mq-breakpoints +/// @param {String | Boolean} $and [false] - Additional media query parameters +/// @param {String | Boolean} $or [false] - Alternative media query parameters +/// @param {String} $media-feature [width] - Media feature: width or height of the output device's rendering surface +/// @param {String} $media-type [$mq-media-type] - Media type: screen, print… /// /// @ignore Undocumented API, for advanced use only: -/// @ignore @param {Map} $breakpoints ($mq-breakpoints) -/// @ignore @param {String} $static-breakpoint ($mq-static-breakpoint) +/// @ignore @param {Map} $breakpoints [$mq-breakpoints] +/// @ignore @param {String} $static-breakpoint [$mq-static-breakpoint] /// /// @requires {Variable} $mq-media-type /// @requires {Variable} $mq-breakpoints @@ -262,17 +278,17 @@ $mq-media-type: all !default; /// Generates a media query block, based on a list of conditions, around a set /// of nested CSS statements. /// -/// @param {String | Boolean} $from (false) - One of $mq-breakpoints -/// @param {String | Boolean} $until (false) - One of $mq-breakpoints -/// @param {String | Boolean} $and (false) - Additional media query parameters -/// @param {String | Boolean} $or (false) - Alternative media query parameters -/// @param {String} $media-feature (width) - Media feature: width or height of the output device's rendering surface -/// @param {String} $media-type ($mq-media-type) - Media type: screen, print… +/// @param {String | Boolean} $from [false] - One of $mq-breakpoints +/// @param {String | Boolean} $until [false] - One of $mq-breakpoints +/// @param {String | Boolean} $and [false] - Additional media query parameters +/// @param {String | Boolean} $or [false] - Alternative media query parameters +/// @param {String} $media-feature [width] - Media feature: width or height of the output device's rendering surface +/// @param {String} $media-type [$mq-media-type] - Media type: screen, print… /// /// @ignore Undocumented API, for advanced use only: -/// @ignore @param {Map} $breakpoints ($mq-breakpoints) -/// @ignore @param {Boolean} $responsive ($mq-responsive) -/// @ignore @param {String} $static-breakpoint ($mq-static-breakpoint) +/// @ignore @param {Map} $breakpoints [$mq-breakpoints] +/// @ignore @param {Boolean} $responsive [$mq-responsive] +/// @ignore @param {String} $static-breakpoint [$mq-static-breakpoint] /// /// @content styling rules, wrapped into a @media query when $responsive is true /// @@ -438,8 +454,8 @@ $mq-media-type: all !default; /// Show the active breakpoint in the top right corner of the viewport /// @link https://github.com/mcaskill/sass-mq#seeing-the-currently-active-breakpoint /// -/// @param {List} $show-breakpoints ($mq-show-breakpoints) - List of breakpoints to show in the top right corner -/// @param {Map} $breakpoints ($mq-breakpoints) - Breakpoint names and sizes +/// @param {List} $show-breakpoints [$mq-show-breakpoints] - List of breakpoints to show in the top right corner +/// @param {Map} $breakpoints [$mq-breakpoints] - Breakpoint names and sizes /// /// @requires {Variable} $mq-breakpoints /// @requires {Variable} $mq-show-breakpoints diff --git a/docs/index.html b/docs/index.html index 1fcce1c..11b282f 100644 --- a/docs/index.html +++ b/docs/index.html @@ -1,5 +1,5 @@ Sass MQ+

General

variables

mq-base-font-size

$mq-base-font-size: 16px !default;

Description

Base font size on the <body> element

Type

Number (unit)

Used by

mq-responsive

$mq-responsive: true !default;

Description

Responsive mode

Set to false to enable support for browsers that do not support @media queries, (IE <= 8, Firefox <= 3, Opera <= 9)

You could create a stylesheet served exclusively to older browsers, where @media queries are rasterized

Type

Boolean

Example

// old-ie.scss
+">

General

variables

[private] mq-base-font-size

Deprecated!

This setting will be removed in sass-mq v6.0.0

$mq-base-font-size: 16px !default;

Description

Base font size on the <body> element

Do not override this value, or things will break

Type

Number (unit)

Used by

Links

mq-responsive

$mq-responsive: true !default;

Description

Responsive mode

Set to false to enable support for browsers that do not support @media queries, (IE <= 8, Firefox <= 3, Opera <= 9)

You could create a stylesheet served exclusively to older browsers, where @media queries are rasterized

Type

Boolean

Example

// old-ie.scss
 $mq-responsive: false;
 @import 'main'; // @media queries in this file will be rasterized up to $mq-static-breakpoint
                  // larger breakpoints will be ignored

Links

mq-breakpoints

$mq-breakpoints: (
@@ -10,11 +10,18 @@
 ) !default;

Description

Breakpoint list

Name your breakpoints in a way that creates a ubiquitous language across team members. It will improve communication between stakeholders, designers, developers, and testers.

Type

Map

Used by

Links

mq-static-breakpoint

$mq-static-breakpoint: desktop !default;

Description

Static breakpoint (for fixed-sized layouts)

Define the breakpoint from $mq-breakpoints that should be used as the target length for the fixed-sized layout (i.e. when $mq-responsive is set to 'false') in a old-ie.scss

Type

String

Example

// tablet-only.scss
 //
 // Ignore all styles above tablet breakpoint,
-// and fix the styles (e.g. layout) at tablet width
+// and fix the styles (such as the layout) at tablet width
 $mq-responsive: false;
 $mq-static-breakpoint: tablet;
 @import 'main'; // @media queries in this file will be rasterized up to tablet
-                 // larger breakpoints will be ignored

Used by

  • [function] mq
  • [mixin] mq

Links

mq-show-breakpoints

$mq-show-breakpoints: () !default;

Description

Show breakpoints in the top right corner

If you want to display the currently active breakpoint in the top right corner of your site during development, add the breakpoints to this list, ordered by length, e.g. (mobile, tablet, desktop).

Type

Map

Used by

mq-media-type

$mq-media-type: all !default;

Description

Customize the media type (e.g. @media screen or @media print) By default sass-mq uses an "all" media type (@media all and …)

Type

String

Used by

  • [function] mq
  • [mixin] mq

Links

functions

mq-px2em

Used by
  • [function] mq
  • [mixin] mq

Links

mq-show-breakpoints

$mq-show-breakpoints: () !default;

Description

Show breakpoints in the top right corner

If you want to display the currently active breakpoint in the top right corner of your site during development, add the breakpoints to this list, ordered by length. For example: (mobile, tablet, desktop).

Type

Map

Example

$mq-show-breakpoints: (mobile, tablet, desktop);
+@import 'path/to/mq';

Used by

mq-media-type

$mq-media-type: all !default;

Description

Customize the media type (for example: @media screen or @media print) By default sass-mq uses an "all" media type (@media all and …)

Type

String

Used by

  • [function] mq
  • [mixin] mq

Links

functions

mq-px2em

@function mq-px2em($px, $base-font-size) { ... }

Description

Convert pixels to ems

Parameters

parameter Nameparameter Descriptionparameter Typeparameter Default value
$px

value to convert

Number none
$base-font-size

($mq-base-font-size) - <body> font size

Number none

Returns

Number

Example

$font-size-in-ems: mq-px2em(16px);
+ }" data-collapsed="@function mq-px2em($px) { ... }">@function mq-px2em($px) { ... }

Description

Convert pixels to ems

Parameters

parameter Nameparameter Descriptionparameter Typeparameter Default value
$px

value to convert

Number none

Returns

Number

Example

$font-size-in-ems: mq-px2em(16px);
 p { font-size: mq-px2em(16px); }

Requires

Used by

mq-get-breakpoint-length

@function mq-get-breakpoint-length($name) { ... }

Description

Get a breakpoint's length

Parameters

parameter Nameparameter Descriptionparameter Typeparameter Default value
$name

Name of the breakpoint. One of $mq-breakpoints

String none

Returns

Number

Value in pixels

Example

$tablet-width: mq-get-breakpoint-length(tablet);
-@media (min-width: mq-get-breakpoint-length(desktop)) {}

Requires

Used by

mq-parse-breakpoint

Requires

Used by

mq-parse-breakpoint

@function mq-parse-breakpoint($value, $exclusive, $breakpoints) { ... }

Description

Parse a breakpoint

Parameters

parameter Nameparameter Descriptionparameter Typeparameter Default value
$value

Length of the breakpoint. One of $breakpoints

String or Number none
$exclusive

(false) - Should the value be an exclusive boundary

Boolean none
$breakpoints

($mq-breakpoints) - Map of breakpoints

Map none

Returns

Number

Value in pixels

Example

@media (min-width: mq-parse-breakpoint(380px)) {}
-@media (min-width: mq-parse-breakpoint(desktop)) {}

Requires

Used by

  • [function] mq
  • [mixin] mq

mq-stringify

@function mq-parse-breakpoint($value, $exclusive: false, $breakpoints: $mq-breakpoints) { ... }

Description

Parse a breakpoint

Parameters

parameter Nameparameter Descriptionparameter Typeparameter Default value
$value

Length of the breakpoint. One of $breakpoints

String or Number none
$exclusive

Should the value be an exclusive boundary

Booleanfalse
$breakpoints

Map of breakpoints

Map$mq-breakpoints

Returns

Number

Value in pixels

Example

@media (min-width: mq-parse-breakpoint(380px)) {}
+@media (min-width: mq-parse-breakpoint(desktop)) {}

Requires

Used by

  • [function] mq
  • [mixin] mq

mq-stringify

@function mq-stringify($list, $glue) { ... }

Description

Joins all elements of $list with $glue.

Parameters

parameter Nameparameter Descriptionparameter Typeparameter Default value
$list

list to cast

List none
$glue

(' and ') - value to use as a join string

String none

Returns

String

Example

mq-stringify(a b c)
+ }" data-collapsed="@function mq-stringify($list, $glue: ' and ') { ... }">@function mq-stringify($list, $glue: ' and ') { ... }

Description

Joins all elements of $list with $glue.

Parameters

parameter Nameparameter Descriptionparameter Typeparameter Default value
$list

list to cast

List none
$glue

value to use as a join string

String' and '

Returns

String

Example

mq-stringify(a b c)
 // a and b and c
mq-stringify(a b c, ', ')
-// a, b, c

Used by

  • [function] mq

mq

Used by
  • [function] mq

mq

@function mq($from, $until, $and, $or, $media-feature, $media-type) { ... }

Description

Media Query Function

Computes a media query based on a list of conditions.

Parameters

parameter Nameparameter Descriptionparameter Typeparameter Default value
$from

(false) - One of $mq-breakpoints

String or Boolean none
$until

(false) - One of $mq-breakpoints

String or Boolean none
$and

(false) - Additional media query parameters

String or Boolean none
$or

(false) - Alternative media query parameters

String or Boolean none
$media-feature

(width) - Media feature: width or height of the output device's rendering surface

String none
$media-type

($mq-media-type) - Media type: screen, print…

String none

Example

$mq-lap-and-up: mq($from: mobile);
+ }" data-collapsed="@function mq($from: false, $until: false, $and: false, $or: false, $media-feature: width, $media-type: $mq-media-type) { ... }">@function mq($from: false, $until: false, $and: false, $or: false, $media-feature: width, $media-type: $mq-media-type) { ... }

Description

Media Query Function

Computes a media query based on a list of conditions.

Parameters

parameter Nameparameter Descriptionparameter Typeparameter Default value
$from

One of $mq-breakpoints

String or Booleanfalse
$until

One of $mq-breakpoints

String or Booleanfalse
$and

Additional media query parameters

String or Booleanfalse
$or

Alternative media query parameters

String or Booleanfalse
$media-feature

Media feature: width or height of the output device's rendering surface

Stringwidth
$media-type

Media type: screen, print…

String$mq-media-type

Example

$mq-lap-and-up: mq($from: mobile);
 
 $mq-palm: mq($until: tablet);
 
@@ -147,7 +154,7 @@
     }
 
     @return $map-sorted;
- }" data-collapsed="@function _mq-map-sort-by-value($map) { ... }">@function _mq-map-sort-by-value($map) { ... }

Description

Sort a map by values (works with numbers only)

Parameters

parameter Nameparameter Descriptionparameter Typeparameter Default value
$map

Map to sort

Map none

Returns

Map

Map sorted by value

mixins

mq

@function _mq-map-sort-by-value($map) { ... }

Description

Sort a map by values (works with numbers only)

Parameters

parameter Nameparameter Descriptionparameter Typeparameter Default value
$map

Map to sort

Map none

Returns

Map

Map sorted by value

mixins

mq

@mixin mq($from, $until, $and, $or, $media-feature, $media-type) { ... }

Description

Media Query Mixin

Generates a media query block, based on a list of conditions, around a set of nested CSS statements.

Parameters

parameter Nameparameter Descriptionparameter Typeparameter Default value
$from

(false) - One of $mq-breakpoints

String or Boolean none
$until

(false) - One of $mq-breakpoints

String or Boolean none
$and

(false) - Additional media query parameters

String or Boolean none
$or

(false) - Alternative media query parameters

String or Boolean none
$media-feature

(width) - Media feature: width or height of the output device's rendering surface

String none
$media-type

($mq-media-type) - Media type: screen, print…

String none

Example

.element {
+ }" data-collapsed="@mixin mq($from: false, $until: false, $and: false, $or: false, $media-feature: width, $media-type: $mq-media-type) { ... }">@mixin mq($from: false, $until: false, $and: false, $or: false, $media-feature: width, $media-type: $mq-media-type) { ... }

Description

Media Query Mixin

Generates a media query block, based on a list of conditions, around a set of nested CSS statements.

Parameters

parameter Nameparameter Descriptionparameter Typeparameter Default value
$from

One of $mq-breakpoints

String or Booleanfalse
$until

One of $mq-breakpoints

String or Booleanfalse
$and

Additional media query parameters

String or Booleanfalse
$or

Alternative media query parameters

String or Booleanfalse
$media-feature

Media feature: width or height of the output device's rendering surface

Stringwidth
$media-type

Media type: screen, print…

String$mq-media-type

Example

.element {
   @include mq($from: mobile) {
     color: red;
   }
@@ -217,7 +224,7 @@
     $mq-breakpoints: map-merge($mq-breakpoints, $new-breakpoint) !global;
     $mq-breakpoints: _mq-map-sort-by-value($mq-breakpoints) !global;
  }" data-collapsed="@mixin mq-add-breakpoint($name, $length) { ... }">@mixin mq-add-breakpoint($name, $length) { ... }

Description

Add a breakpoint

Parameters

parameter Nameparameter Descriptionparameter Typeparameter Default value
$name

Name of the breakpoint

String none
$length

Length of the breakpoint

Number none

Example

@include mq-add-breakpoint(tvscreen, 1920px);
-@include mq(tvscreen) {}

Requires

mq-show-breakpoints

Requires

mq-show-breakpoints

@mixin mq-show-breakpoints($show-breakpoints, $breakpoints) { ... }

Description

Show the active breakpoint in the top right corner of the viewport

Parameters

parameter Nameparameter Descriptionparameter Typeparameter Default value
$show-breakpoints

($mq-show-breakpoints) - List of breakpoints to show in the top right corner

List none
$breakpoints

($mq-breakpoints) - Breakpoint names and sizes

Map none

Example

// Show breakpoints using global settings
+ }" data-collapsed="@mixin mq-show-breakpoints($show-breakpoints: $mq-show-breakpoints, $breakpoints: $mq-breakpoints) { ... }">@mixin mq-show-breakpoints($show-breakpoints: $mq-show-breakpoints, $breakpoints: $mq-breakpoints) { ... }

Description

Show the active breakpoint in the top right corner of the viewport

Parameters

parameter Nameparameter Descriptionparameter Typeparameter Default value
$show-breakpoints

List of breakpoints to show in the top right corner

List$mq-show-breakpoints
$breakpoints

Breakpoint names and sizes

Map$mq-breakpoints

Example

// Show breakpoints using global settings
 @include mq-show-breakpoints;
 
 // Show breakpoints using custom settings
diff --git a/package-lock.json b/package-lock.json
index a834b86..d4bfd2a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,15 +1,33 @@
 {
   "name": "sass-mq",
-  "version": "5.0.0",
+  "version": "5.0.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "a-sync-waterfall": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/a-sync-waterfall/-/a-sync-waterfall-1.0.1.tgz",
+      "integrity": "sha512-RYTOHHdWipFUliRFMCS4X2Yn2X8M87V/OpSqWzKKOGhzqyUxzyVmhHDH9sAvG+ZuQf/TAOFsLCpMw09I1ufUnA==",
+      "dev": true
+    },
     "abbrev": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
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+      "integrity": "sha512-gwMdhgJHGuj/+wHJJs9e6PcCszpxR1b236igrOkUofGhqJuG+amlIKwApH1IW1WWl7ovZxsX49lMBWLxSdm5Dw==",
       "dev": true,
       "requires": {
         "boxen": "^1.2.1",
         "chalk": "^2.0.1",
         "configstore": "^3.0.0",
         "import-lazy": "^2.1.0",
+        "is-ci": "^1.0.10",
         "is-installed-globally": "^0.1.0",
         "is-npm": "^1.0.0",
         "latest-version": "^3.0.0",
@@ -3516,32 +5214,32 @@
       },
       "dependencies": {
         "ansi-styles": {
-          "version": "3.2.0",
-          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.0.tgz",
-          "integrity": "sha512-NnSOmMEYtVR2JVMIGTzynRkkaxtiq1xnFBcdQD/DnNCYPoEPsVJhM98BDyaoNOQIi7p4okdi3E27eN7GQbsUug==",
+          "version": "3.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
           "dev": true,
           "requires": {
             "color-convert": "^1.9.0"
           }
         },
         "chalk": {
-          "version": "2.3.0",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.3.0.tgz",
-          "integrity": "sha512-Az5zJR2CBujap2rqXGaJKaPHyJ0IrUimvYNX+ncCy8PJP4ltOGTrHUIo097ZaL2zMeKYpiCdqDvS6zdrTFok3Q==",
+          "version": "2.4.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
           "dev": true,
           "requires": {
-            "ansi-styles": "^3.1.0",
+            "ansi-styles": "^3.2.1",
             "escape-string-regexp": "^1.0.5",
-            "supports-color": "^4.0.0"
+            "supports-color": "^5.3.0"
           }
         },
         "supports-color": {
-          "version": "4.5.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-4.5.0.tgz",
-          "integrity": "sha1-vnoN5ITexcXN34s9WRJQRJEvY1s=",
+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
           "dev": true,
           "requires": {
-            "has-flag": "^2.0.0"
+            "has-flag": "^3.0.0"
           }
         }
       }
@@ -3552,6 +5250,22 @@
       "integrity": "sha1-9rRQHC7EzdJrp4vnIilh3ndiFZg=",
       "dev": true
     },
+    "uri-js": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
+      "integrity": "sha512-KY9Frmirql91X2Qgjry0Wd4Y+YTdrdZheS8TFwvkbLWf/G5KNJDCh6pKL5OZctEW4+0Baa5idK2ZQuELRwPznQ==",
+      "dev": true,
+      "requires": {
+        "punycode": "^2.1.0"
+      }
+    },
+    "urix": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/urix/-/urix-0.1.0.tgz",
+      "integrity": "sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI=",
+      "dev": true,
+      "optional": true
+    },
     "url-parse-lax": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/url-parse-lax/-/url-parse-lax-1.0.0.tgz",
@@ -3561,6 +5275,13 @@
         "prepend-http": "^1.0.1"
       }
     },
+    "use": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/use/-/use-3.1.1.tgz",
+      "integrity": "sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ==",
+      "dev": true,
+      "optional": true
+    },
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
@@ -3568,9 +5289,9 @@
       "dev": true
     },
     "uuid": {
-      "version": "3.2.1",
-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.2.1.tgz",
-      "integrity": "sha512-jZnMwlb9Iku/O3smGWvZhauCf6cvvpKi4BKRiliS3cxnI+Gz9j5MEpTz2UFuXiKPJocb7gnsLHwiS05ige5BEA==",
+      "version": "3.3.2",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
+      "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==",
       "dev": true
     },
     "vali-date": {
@@ -3580,9 +5301,9 @@
       "dev": true
     },
     "validate-npm-package-license": {
-      "version": "3.0.3",
-      "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.3.tgz",
-      "integrity": "sha512-63ZOUnL4SIXj4L0NixR3L1lcjO38crAbgrTpl28t8jjrfuiOBL5Iygm+60qPs/KsZGzPNg6Smnc/oY16QTjF0g==",
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
+      "integrity": "sha512-DpKm2Ui/xN7/HQKCtpZxoRWBhZ9Z0kqtygG8XCgNQ8ZlDnxuQmWhj566j8fN4Cu3/JmbhsDo7fcAJq4s9h27Ew==",
       "dev": true,
       "requires": {
         "spdx-correct": "^3.0.0",
@@ -3598,14 +5319,6 @@
         "assert-plus": "^1.0.0",
         "core-util-is": "1.0.2",
         "extsprintf": "^1.2.0"
-      },
-      "dependencies": {
-        "assert-plus": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
-          "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
-          "dev": true
-        }
       }
     },
     "vinyl": {
@@ -3645,24 +5358,24 @@
       },
       "dependencies": {
         "through2": {
-          "version": "2.0.3",
-          "resolved": "https://registry.npmjs.org/through2/-/through2-2.0.3.tgz",
-          "integrity": "sha1-AARWmzfHx0ujnEPzzteNGtlBQL4=",
+          "version": "2.0.5",
+          "resolved": "https://registry.npmjs.org/through2/-/through2-2.0.5.tgz",
+          "integrity": "sha512-/mrRod8xqpA+IHSLyGCQ2s8SPHiCDEeQJSep1jqLYeEUClOFG2Qsh+4FU6G9VeqpZnGW/Su8LQGc4YKni5rYSQ==",
           "dev": true,
           "requires": {
-            "readable-stream": "^2.1.5",
+            "readable-stream": "~2.3.6",
             "xtend": "~4.0.1"
           }
         }
       }
     },
     "vinyl-source-stream": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/vinyl-source-stream/-/vinyl-source-stream-1.1.0.tgz",
-      "integrity": "sha1-RMvlEIIFJ53rDFZTwJSiiHk4sas=",
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vinyl-source-stream/-/vinyl-source-stream-1.1.2.tgz",
+      "integrity": "sha1-YrU6E1YQqJbpjKlr7jqH8Aio54A=",
       "dev": true,
       "requires": {
-        "through2": "^0.6.1",
+        "through2": "^2.0.3",
         "vinyl": "^0.4.3"
       },
       "dependencies": {
@@ -3672,38 +5385,14 @@
           "integrity": "sha1-xhJqkK1Pctv1rNskPMN3JP6T/B8=",
           "dev": true
         },
-        "isarray": {
-          "version": "0.0.1",
-          "resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz",
-          "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=",
-          "dev": true
-        },
-        "readable-stream": {
-          "version": "1.0.34",
-          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.0.34.tgz",
-          "integrity": "sha1-Elgg40vIQtLyqq+v5MKRbuMsFXw=",
-          "dev": true,
-          "requires": {
-            "core-util-is": "~1.0.0",
-            "inherits": "~2.0.1",
-            "isarray": "0.0.1",
-            "string_decoder": "~0.10.x"
-          }
-        },
-        "string_decoder": {
-          "version": "0.10.31",
-          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
-          "integrity": "sha1-YuIDvEF2bGwoyfyEMB2rHFMQ+pQ=",
-          "dev": true
-        },
         "through2": {
-          "version": "0.6.5",
-          "resolved": "https://registry.npmjs.org/through2/-/through2-0.6.5.tgz",
-          "integrity": "sha1-QaucZ7KdVyCQcUEOHXp6lozTrUg=",
+          "version": "2.0.5",
+          "resolved": "https://registry.npmjs.org/through2/-/through2-2.0.5.tgz",
+          "integrity": "sha512-/mrRod8xqpA+IHSLyGCQ2s8SPHiCDEeQJSep1jqLYeEUClOFG2Qsh+4FU6G9VeqpZnGW/Su8LQGc4YKni5rYSQ==",
           "dev": true,
           "requires": {
-            "readable-stream": ">=1.0.33-1 <1.1.0-0",
-            "xtend": ">=4.0.0 <4.1.0-0"
+            "readable-stream": "~2.3.6",
+            "xtend": "~4.0.1"
           }
         },
         "vinyl": {
@@ -3728,9 +5417,9 @@
       }
     },
     "which": {
-      "version": "1.2.14",
-      "resolved": "https://registry.npmjs.org/which/-/which-1.2.14.tgz",
-      "integrity": "sha1-mofEN48D6CfOyvGs31bHNsAcFOU=",
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+      "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
       "dev": true,
       "requires": {
         "isexe": "^2.0.0"
@@ -3743,18 +5432,18 @@
       "dev": true
     },
     "wide-align": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.2.tgz",
-      "integrity": "sha512-ijDLlyQ7s6x1JgCLur53osjm/UXUYD9+0PbYKrBsYisYXzCxN+HC3mYDNy/dWdmf3AwqwU3CXwDCvsNgGK1S0w==",
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
+      "integrity": "sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==",
       "dev": true,
       "requires": {
-        "string-width": "^1.0.2"
+        "string-width": "^1.0.2 || 2"
       }
     },
     "widest-line": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/widest-line/-/widest-line-2.0.0.tgz",
-      "integrity": "sha1-AUKk6KJD+IgsAjOqDgKBqnYVInM=",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/widest-line/-/widest-line-2.0.1.tgz",
+      "integrity": "sha512-Ba5m9/Fa4Xt9eb2ELXt77JxVDV8w7qQrH0zS/TWSJdLyAwQjWoOzpzj5lwVftDz6n/EOu3tNACS84v509qwnJA==",
       "dev": true,
       "requires": {
         "string-width": "^2.1.1"
@@ -3794,15 +5483,9 @@
       }
     },
     "window-size": {
-      "version": "0.1.0",
-      "resolved": "https://registry.npmjs.org/window-size/-/window-size-0.1.0.tgz",
-      "integrity": "sha1-VDjNLqk7IC76Ohn+iIeu58lPnJ0=",
-      "dev": true
-    },
-    "wordwrap": {
-      "version": "0.0.3",
-      "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz",
-      "integrity": "sha1-o9XabNXAvAAI03I0u68b7WMFkQc=",
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/window-size/-/window-size-0.1.4.tgz",
+      "integrity": "sha1-+OGqHuWlPsW/FR/6CXQqatdpeHY=",
       "dev": true
     },
     "wrap-ansi": {
@@ -3822,9 +5505,9 @@
       "dev": true
     },
     "write-file-atomic": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.3.0.tgz",
-      "integrity": "sha512-xuPeK4OdjWqtfi59ylvVL0Yn35SF3zgcAcv7rBPFHVaEapaDr4GdGgm3j7ckTwH9wHL7fGmgfAnb0+THrHb8tA==",
+      "version": "2.4.3",
+      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.4.3.tgz",
+      "integrity": "sha512-GaETH5wwsX+GcnzhPgKcKjJ6M2Cq3/iZp1WyY/X1CSqrW+jVNM9Y7D8EC2sM4ZG/V8wZlSniJnCKWPmBYAucRQ==",
       "dev": true,
       "requires": {
         "graceful-fs": "^4.1.11",
@@ -3838,12 +5521,6 @@
       "integrity": "sha1-SWsswQnsqNus/i3HK2A8F8WHCtQ=",
       "dev": true
     },
-    "xml-char-classes": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/xml-char-classes/-/xml-char-classes-1.0.0.tgz",
-      "integrity": "sha1-ZGV4SKIP/F31g6Qq2KJ3tFErvE0=",
-      "dev": true
-    },
     "xtend": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
@@ -3857,9 +5534,9 @@
       "dev": true
     },
     "yallist": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
-      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.3.tgz",
+      "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A==",
       "dev": true
     },
     "yargs": {
diff --git a/package.json b/package.json
index c6a0e28..20f66de 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@mcaskill/sass-mq",
   "description": "mq()+ is a Sass library that helps manipulating media queries in an elegant way.",
-  "version": "5.0.0",
+  "version": "5.0.1",
   "keywords": [
     "responsive",
     "sass",
@@ -58,8 +58,8 @@
     "exports": false
   },
   "devDependencies": {
-    "eyeglass": "^1.5.0",
-    "node-sass": "^4.9.0",
-    "sassdoc": "^2.5.0"
+    "eyeglass": "^2.4.1",
+    "node-sass": "^4.12.0",
+    "sassdoc": "^2.7.0"
   }
 }
diff --git a/test/_after-import.scss b/test/_after-import.scss
index 24640b5..ee1faac 100644
--- a/test/_after-import.scss
+++ b/test/_after-import.scss
@@ -118,7 +118,7 @@
 }
 
 /* Rasterized styles that span or start at the "desktop" breakpoint */
-// (e.g. to serve to IE8 via conditional comments in a separate stylesheet)
+// for example: to serve to IE8 via conditional comments in a separate stylesheet
 $mq-responsive:        false;
 $mq-static-breakpoint: desktop;
 
@@ -163,3 +163,11 @@ body {
         font-size: 2rem;
     }
 }
+
+/* Override $mq-base-font-size (should log a warning) */
+$mq-base-font-size: 12px;
+body {
+    @include mq(mobile) {
+        font-size: 2rem;
+    }
+}
diff --git a/test/output/dart-sass.log b/test/output/dart-sass.log
index 07f8263..f69f79f 100644
--- a/test/output/dart-sass.log
+++ b/test/output/dart-sass.log
@@ -1,51 +1,67 @@
 WARNING: Assuming 640 to be in pixels, attempting to convert it into pixels.
-    _mq.scss 90:9                  mq-px2em()
-    _mq.scss 134:17                mq-parse-breakpoint()
-    _mq.scss 223:20                mq()
-    _mq.scss 359:23                mq()
+    _mq.scss 106:9                 mq-px2em()
+    _mq.scss 150:17                mq-parse-breakpoint()
+    _mq.scss 239:20                mq()
+    _mq.scss 375:23                mq()
     test/_after-import.scss 17:5   styles()
     test/_after-import.scss 117:5  @import
     test/test.scss 6:9             root stylesheet
 
 WARNING: Assuming 768 to be in pixels, attempting to convert it into pixels.
-    _mq.scss 90:9                  mq-px2em()
-    _mq.scss 134:17                mq-parse-breakpoint()
-    _mq.scss 223:20                mq()
-    _mq.scss 359:23                mq()
+    _mq.scss 106:9                 mq-px2em()
+    _mq.scss 150:17                mq-parse-breakpoint()
+    _mq.scss 239:20                mq()
+    _mq.scss 375:23                mq()
     test/_after-import.scss 37:5   styles()
     test/_after-import.scss 117:5  @import
     test/test.scss 6:9             root stylesheet
 
 WARNING: Assuming 1023 to be in pixels, attempting to convert it into pixels.
-    _mq.scss 90:9                  mq-px2em()
-    _mq.scss 134:17                mq-parse-breakpoint()
-    _mq.scss 228:21                mq()
-    _mq.scss 359:23                mq()
+    _mq.scss 106:9                 mq-px2em()
+    _mq.scss 150:17                mq-parse-breakpoint()
+    _mq.scss 244:21                mq()
+    _mq.scss 375:23                mq()
     test/_after-import.scss 37:5   styles()
     test/_after-import.scss 117:5  @import
     test/test.scss 6:9             root stylesheet
 
 WARNING: Assuming 640 to be in pixels, attempting to convert it into pixels.
-    _mq.scss 90:9                  mq-px2em()
-    _mq.scss 134:17                mq-parse-breakpoint()
-    _mq.scss 333:25                mq()
+    _mq.scss 106:9                 mq-px2em()
+    _mq.scss 150:17                mq-parse-breakpoint()
+    _mq.scss 349:25                mq()
     test/_after-import.scss 17:5   styles()
     test/_after-import.scss 126:5  @import
     test/test.scss 6:9             root stylesheet
 
 WARNING: Assuming 768 to be in pixels, attempting to convert it into pixels.
-    _mq.scss 90:9                  mq-px2em()
-    _mq.scss 134:17                mq-parse-breakpoint()
-    _mq.scss 333:25                mq()
+    _mq.scss 106:9                 mq-px2em()
+    _mq.scss 150:17                mq-parse-breakpoint()
+    _mq.scss 349:25                mq()
     test/_after-import.scss 37:5   styles()
     test/_after-import.scss 126:5  @import
     test/test.scss 6:9             root stylesheet
 
 WARNING: Assuming 1023 to be in pixels, attempting to convert it into pixels.
-    _mq.scss 90:9                  mq-px2em()
-    _mq.scss 134:17                mq-parse-breakpoint()
-    _mq.scss 338:25                mq()
+    _mq.scss 106:9                 mq-px2em()
+    _mq.scss 150:17                mq-parse-breakpoint()
+    _mq.scss 354:25                mq()
     test/_after-import.scss 37:5   styles()
     test/_after-import.scss 126:5  @import
     test/test.scss 6:9             root stylesheet
 
+WARNING: Overriding $mq-base-font-size will break things, see https://github.com/sass-mq/sass-mq/issues/122.
+    _mq.scss 100:9                 mq-px2em()
+    _mq.scss 152:17                mq-parse-breakpoint()
+    _mq.scss 239:20                mq()
+    _mq.scss 375:23                mq()
+    test/_after-import.scss 170:5  @import
+    test/test.scss 6:9             root stylesheet
+
+WARNING: The $base-font-size argument will be removed in sass-mq v6.0.0, as overriding it breaks things, see https://github.com/sass-mq/sass-mq/issues/122.
+    _mq.scss 103:9                 mq-px2em()
+    _mq.scss 152:17                mq-parse-breakpoint()
+    _mq.scss 239:20                mq()
+    _mq.scss 375:23                mq()
+    test/_after-import.scss 170:5  @import
+    test/test.scss 6:9             root stylesheet
+
diff --git a/test/output/eyeglass.log b/test/output/eyeglass.log
index 4724ff6..6bad213 100644
--- a/test/output/eyeglass.log
+++ b/test/output/eyeglass.log
@@ -1,51 +1,67 @@
 WARNING: Assuming 640 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in function `mq-px2em`
-         from line 134 of _mq.scss, in function `mq-parse-breakpoint`
-         from line 223 of _mq.scss, in function `mq`
-         from line 359 of _mq.scss, in mixin `mq`
+         on line 106 of _mq.scss, in function `mq-px2em`
+         from line 150 of _mq.scss, in function `mq-parse-breakpoint`
+         from line 239 of _mq.scss, in function `mq`
+         from line 375 of _mq.scss, in mixin `mq`
          from line 17 of test/_after-import.scss, in mixin `styles`
          from line 117 of test/_after-import.scss
          from line 6 of test/test-eyeglass.scss
 
 WARNING: Assuming 768 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in function `mq-px2em`
-         from line 134 of _mq.scss, in function `mq-parse-breakpoint`
-         from line 223 of _mq.scss, in function `mq`
-         from line 359 of _mq.scss, in mixin `mq`
+         on line 106 of _mq.scss, in function `mq-px2em`
+         from line 150 of _mq.scss, in function `mq-parse-breakpoint`
+         from line 239 of _mq.scss, in function `mq`
+         from line 375 of _mq.scss, in mixin `mq`
          from line 37 of test/_after-import.scss, in mixin `styles`
          from line 117 of test/_after-import.scss
          from line 6 of test/test-eyeglass.scss
 
 WARNING: Assuming 1023 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in function `mq-px2em`
-         from line 134 of _mq.scss, in function `mq-parse-breakpoint`
-         from line 228 of _mq.scss, in function `mq`
-         from line 359 of _mq.scss, in mixin `mq`
+         on line 106 of _mq.scss, in function `mq-px2em`
+         from line 150 of _mq.scss, in function `mq-parse-breakpoint`
+         from line 244 of _mq.scss, in function `mq`
+         from line 375 of _mq.scss, in mixin `mq`
          from line 37 of test/_after-import.scss, in mixin `styles`
          from line 117 of test/_after-import.scss
          from line 6 of test/test-eyeglass.scss
 
 WARNING: Assuming 640 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in function `mq-px2em`
-         from line 134 of _mq.scss, in function `mq-parse-breakpoint`
-         from line 333 of _mq.scss, in mixin `mq`
+         on line 106 of _mq.scss, in function `mq-px2em`
+         from line 150 of _mq.scss, in function `mq-parse-breakpoint`
+         from line 349 of _mq.scss, in mixin `mq`
          from line 17 of test/_after-import.scss, in mixin `styles`
          from line 126 of test/_after-import.scss
          from line 6 of test/test-eyeglass.scss
 
 WARNING: Assuming 768 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in function `mq-px2em`
-         from line 134 of _mq.scss, in function `mq-parse-breakpoint`
-         from line 333 of _mq.scss, in mixin `mq`
+         on line 106 of _mq.scss, in function `mq-px2em`
+         from line 150 of _mq.scss, in function `mq-parse-breakpoint`
+         from line 349 of _mq.scss, in mixin `mq`
          from line 37 of test/_after-import.scss, in mixin `styles`
          from line 126 of test/_after-import.scss
          from line 6 of test/test-eyeglass.scss
 
 WARNING: Assuming 1023 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in function `mq-px2em`
-         from line 134 of _mq.scss, in function `mq-parse-breakpoint`
-         from line 338 of _mq.scss, in mixin `mq`
+         on line 106 of _mq.scss, in function `mq-px2em`
+         from line 150 of _mq.scss, in function `mq-parse-breakpoint`
+         from line 354 of _mq.scss, in mixin `mq`
          from line 37 of test/_after-import.scss, in mixin `styles`
          from line 126 of test/_after-import.scss
          from line 6 of test/test-eyeglass.scss
 
+WARNING: Overriding $mq-base-font-size will break things, see https://github.com/sass-mq/sass-mq/issues/122.
+         on line 100 of _mq.scss, in function `mq-px2em`
+         from line 152 of _mq.scss, in function `mq-parse-breakpoint`
+         from line 239 of _mq.scss, in function `mq`
+         from line 375 of _mq.scss, in mixin `mq`
+         from line 170 of test/_after-import.scss
+         from line 6 of test/test-eyeglass.scss
+
+WARNING: The $base-font-size argument will be removed in sass-mq v6.0.0, as overriding it breaks things, see https://github.com/sass-mq/sass-mq/issues/122.
+         on line 103 of _mq.scss, in function `mq-px2em`
+         from line 152 of _mq.scss, in function `mq-parse-breakpoint`
+         from line 239 of _mq.scss, in function `mq`
+         from line 375 of _mq.scss, in mixin `mq`
+         from line 170 of test/_after-import.scss
+         from line 6 of test/test-eyeglass.scss
+
diff --git a/test/output/node-sass.log b/test/output/node-sass.log
index 23e9b21..54e66f1 100644
--- a/test/output/node-sass.log
+++ b/test/output/node-sass.log
@@ -1,51 +1,67 @@
 WARNING: Assuming 640 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in function `mq-px2em`
-         from line 134 of _mq.scss, in function `mq-parse-breakpoint`
-         from line 223 of _mq.scss, in function `mq`
-         from line 359 of _mq.scss, in mixin `mq`
+         on line 106 of _mq.scss, in function `mq-px2em`
+         from line 150 of _mq.scss, in function `mq-parse-breakpoint`
+         from line 239 of _mq.scss, in function `mq`
+         from line 375 of _mq.scss, in mixin `mq`
          from line 17 of test/_after-import.scss, in mixin `styles`
          from line 117 of test/_after-import.scss
          from line 6 of test/test.scss
 
 WARNING: Assuming 768 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in function `mq-px2em`
-         from line 134 of _mq.scss, in function `mq-parse-breakpoint`
-         from line 223 of _mq.scss, in function `mq`
-         from line 359 of _mq.scss, in mixin `mq`
+         on line 106 of _mq.scss, in function `mq-px2em`
+         from line 150 of _mq.scss, in function `mq-parse-breakpoint`
+         from line 239 of _mq.scss, in function `mq`
+         from line 375 of _mq.scss, in mixin `mq`
          from line 37 of test/_after-import.scss, in mixin `styles`
          from line 117 of test/_after-import.scss
          from line 6 of test/test.scss
 
 WARNING: Assuming 1023 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in function `mq-px2em`
-         from line 134 of _mq.scss, in function `mq-parse-breakpoint`
-         from line 228 of _mq.scss, in function `mq`
-         from line 359 of _mq.scss, in mixin `mq`
+         on line 106 of _mq.scss, in function `mq-px2em`
+         from line 150 of _mq.scss, in function `mq-parse-breakpoint`
+         from line 244 of _mq.scss, in function `mq`
+         from line 375 of _mq.scss, in mixin `mq`
          from line 37 of test/_after-import.scss, in mixin `styles`
          from line 117 of test/_after-import.scss
          from line 6 of test/test.scss
 
 WARNING: Assuming 640 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in function `mq-px2em`
-         from line 134 of _mq.scss, in function `mq-parse-breakpoint`
-         from line 333 of _mq.scss, in mixin `mq`
+         on line 106 of _mq.scss, in function `mq-px2em`
+         from line 150 of _mq.scss, in function `mq-parse-breakpoint`
+         from line 349 of _mq.scss, in mixin `mq`
          from line 17 of test/_after-import.scss, in mixin `styles`
          from line 126 of test/_after-import.scss
          from line 6 of test/test.scss
 
 WARNING: Assuming 768 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in function `mq-px2em`
-         from line 134 of _mq.scss, in function `mq-parse-breakpoint`
-         from line 333 of _mq.scss, in mixin `mq`
+         on line 106 of _mq.scss, in function `mq-px2em`
+         from line 150 of _mq.scss, in function `mq-parse-breakpoint`
+         from line 349 of _mq.scss, in mixin `mq`
          from line 37 of test/_after-import.scss, in mixin `styles`
          from line 126 of test/_after-import.scss
          from line 6 of test/test.scss
 
 WARNING: Assuming 1023 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in function `mq-px2em`
-         from line 134 of _mq.scss, in function `mq-parse-breakpoint`
-         from line 338 of _mq.scss, in mixin `mq`
+         on line 106 of _mq.scss, in function `mq-px2em`
+         from line 150 of _mq.scss, in function `mq-parse-breakpoint`
+         from line 354 of _mq.scss, in mixin `mq`
          from line 37 of test/_after-import.scss, in mixin `styles`
          from line 126 of test/_after-import.scss
          from line 6 of test/test.scss
 
+WARNING: Overriding $mq-base-font-size will break things, see https://github.com/sass-mq/sass-mq/issues/122.
+         on line 100 of _mq.scss, in function `mq-px2em`
+         from line 152 of _mq.scss, in function `mq-parse-breakpoint`
+         from line 239 of _mq.scss, in function `mq`
+         from line 375 of _mq.scss, in mixin `mq`
+         from line 170 of test/_after-import.scss
+         from line 6 of test/test.scss
+
+WARNING: The $base-font-size argument will be removed in sass-mq v6.0.0, as overriding it breaks things, see https://github.com/sass-mq/sass-mq/issues/122.
+         on line 103 of _mq.scss, in function `mq-px2em`
+         from line 152 of _mq.scss, in function `mq-parse-breakpoint`
+         from line 239 of _mq.scss, in function `mq`
+         from line 375 of _mq.scss, in mixin `mq`
+         from line 170 of test/_after-import.scss
+         from line 6 of test/test.scss
+
diff --git a/test/output/ruby-sass.log b/test/output/ruby-sass.log
index ec6ac99..90abcef 100644
--- a/test/output/ruby-sass.log
+++ b/test/output/ruby-sass.log
@@ -1,51 +1,67 @@
 WARNING: Assuming 640 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in `mq-px2em'
-         from line 134 of _mq.scss, in `mq-parse-breakpoint'
-         from line 223 of _mq.scss, in `mq'
-         from line 359 of _mq.scss, in `mq'
+         on line 106 of _mq.scss, in `mq-px2em'
+         from line 150 of _mq.scss, in `mq-parse-breakpoint'
+         from line 239 of _mq.scss, in `mq'
+         from line 375 of _mq.scss, in `mq'
          from line 17 of test/_after-import.scss, in `styles'
          from line 117 of test/_after-import.scss
          from line 6 of test/test.scss
 
 WARNING: Assuming 768 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in `mq-px2em'
-         from line 134 of _mq.scss, in `mq-parse-breakpoint'
-         from line 223 of _mq.scss, in `mq'
-         from line 359 of _mq.scss, in `mq'
+         on line 106 of _mq.scss, in `mq-px2em'
+         from line 150 of _mq.scss, in `mq-parse-breakpoint'
+         from line 239 of _mq.scss, in `mq'
+         from line 375 of _mq.scss, in `mq'
          from line 37 of test/_after-import.scss, in `styles'
          from line 117 of test/_after-import.scss
          from line 6 of test/test.scss
 
 WARNING: Assuming 1023 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in `mq-px2em'
-         from line 134 of _mq.scss, in `mq-parse-breakpoint'
-         from line 228 of _mq.scss, in `mq'
-         from line 359 of _mq.scss, in `mq'
+         on line 106 of _mq.scss, in `mq-px2em'
+         from line 150 of _mq.scss, in `mq-parse-breakpoint'
+         from line 244 of _mq.scss, in `mq'
+         from line 375 of _mq.scss, in `mq'
          from line 37 of test/_after-import.scss, in `styles'
          from line 117 of test/_after-import.scss
          from line 6 of test/test.scss
 
 WARNING: Assuming 640 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in `mq-px2em'
-         from line 134 of _mq.scss, in `mq-parse-breakpoint'
-         from line 333 of _mq.scss, in `mq'
+         on line 106 of _mq.scss, in `mq-px2em'
+         from line 150 of _mq.scss, in `mq-parse-breakpoint'
+         from line 349 of _mq.scss, in `mq'
          from line 17 of test/_after-import.scss, in `styles'
          from line 126 of test/_after-import.scss
          from line 6 of test/test.scss
 
 WARNING: Assuming 768 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in `mq-px2em'
-         from line 134 of _mq.scss, in `mq-parse-breakpoint'
-         from line 333 of _mq.scss, in `mq'
+         on line 106 of _mq.scss, in `mq-px2em'
+         from line 150 of _mq.scss, in `mq-parse-breakpoint'
+         from line 349 of _mq.scss, in `mq'
          from line 37 of test/_after-import.scss, in `styles'
          from line 126 of test/_after-import.scss
          from line 6 of test/test.scss
 
 WARNING: Assuming 1023 to be in pixels, attempting to convert it into pixels.
-         on line 90 of _mq.scss, in `mq-px2em'
-         from line 134 of _mq.scss, in `mq-parse-breakpoint'
-         from line 338 of _mq.scss, in `mq'
+         on line 106 of _mq.scss, in `mq-px2em'
+         from line 150 of _mq.scss, in `mq-parse-breakpoint'
+         from line 354 of _mq.scss, in `mq'
          from line 37 of test/_after-import.scss, in `styles'
          from line 126 of test/_after-import.scss
          from line 6 of test/test.scss
 
+WARNING: Overriding $mq-base-font-size will break things, see https://github.com/sass-mq/sass-mq/issues/122.
+         on line 100 of _mq.scss, in `mq-px2em'
+         from line 152 of _mq.scss, in `mq-parse-breakpoint'
+         from line 239 of _mq.scss, in `mq'
+         from line 375 of _mq.scss, in `mq'
+         from line 170 of test/_after-import.scss
+         from line 6 of test/test.scss
+
+WARNING: The $base-font-size argument will be removed in sass-mq v6.0.0, as overriding it breaks things, see https://github.com/sass-mq/sass-mq/issues/122.
+         on line 103 of _mq.scss, in `mq-px2em'
+         from line 152 of _mq.scss, in `mq-parse-breakpoint'
+         from line 239 of _mq.scss, in `mq'
+         from line 375 of _mq.scss, in `mq'
+         from line 170 of test/_after-import.scss
+         from line 6 of test/test.scss
+
diff --git a/test/output/test-dart.css b/test/output/test-dart.css
index 3b6b7af..53fee2d 100644
--- a/test/output/test-dart.css
+++ b/test/output/test-dart.css
@@ -214,3 +214,10 @@ body:before {
     font-size: 2rem;
   }
 }
+
+/* Override $mq-base-font-size (should log a warning) */
+@media print and (min-width: 26.6666666667em) {
+  body {
+    font-size: 2rem;
+  }
+}
diff --git a/test/output/test-eyeglass.css b/test/output/test-eyeglass.css
index 7f94ebf..9662375 100644
--- a/test/output/test-eyeglass.css
+++ b/test/output/test-eyeglass.css
@@ -147,3 +147,8 @@ body:before {
 @media print and (max-width: 19.99em) {
   body {
     font-size: 2rem; } }
+
+/* Override $mq-base-font-size (should log a warning) */
+@media print and (min-width: 26.66667em) {
+  body {
+    font-size: 2rem; } }
diff --git a/test/output/test-node.css b/test/output/test-node.css
index 7f94ebf..9662375 100644
--- a/test/output/test-node.css
+++ b/test/output/test-node.css
@@ -147,3 +147,8 @@ body:before {
 @media print and (max-width: 19.99em) {
   body {
     font-size: 2rem; } }
+
+/* Override $mq-base-font-size (should log a warning) */
+@media print and (min-width: 26.66667em) {
+  body {
+    font-size: 2rem; } }
diff --git a/test/output/test-ruby.css b/test/output/test-ruby.css
index 93b6f94..dfdc722 100644
--- a/test/output/test-ruby.css
+++ b/test/output/test-ruby.css
@@ -146,3 +146,8 @@ body:before {
 @media print and (max-width: 19.99em) {
   body {
     font-size: 2rem; } }
+
+/* Override $mq-base-font-size (should log a warning) */
+@media print and (min-width: 26.6666666667em) {
+  body {
+    font-size: 2rem; } }