turns human readable breakpoints into correct mediaqueries

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000.0.56 years ago6 years agoMinified + gzip package size for mediaquerywh in KB


NB: This is a fork of and extended with the option of passing media query direction (width, height, default width).
Turns human readable breakpoints into correct mediaqueries.
This is particularly useful when working with window.matchMedia or when you work with CSS dinamically using JavaScript.


If you are using nodejs (but also browserify, webpack, etc...) you can simply use npm:
npm install mediaquery
then you can
var MQ = require('mediaquery');
By the way you if you are not using node, you may use bower
bower install mediaquery
then you can use it from window.MQ or require it using AMD

Show me the code!

Assuming you have an object to describe the mediaqueries you need such as
var myMedias = {
  small: 300,
  medium: 600,
  tablet: 'tablet media query',
  big: 1024,
  huge: Infinity

Note that all the numerical values (Infinity included) will be automatically sorted in the correct order, while all the strings will be considered custome media queries; every other type of values will be stripped out.
So small: 300 means that my small media query will span from 0 to 300px, while medium will be from 301px to 600px; finally huge will go from 1025px to... Infinitely large screens.
If you do not specify an Infinity breakpoint a default breakpoint will be created spanning from the biggest available breakpoint to infinity.


You can use asObject to get back a similar object where the numbers for your breakpoints are substituted with correct mediaqueries.
var MQ = require('mediaqueries');


will return
  small: 'screen and (max-width: 300px)',
  medium: 'screen and (min-width: 301px) and (max-width: 600px)',
  big: 'screen and (min-width: 601px) and (max-width: 1024px)',
  huge: 'screen and (min-width: 1025px)',
  tablet: 'tablet media query'


You can also have an array of couples 'name', 'mediaquery' in output.

will return
  ['small', 'screen and (max-width: 300px)'],
  ['medium', 'screen and (min-width: 301px) and (max-width: 600px)'],
  ['big', 'screen and (min-width: 601px) and (max-width: 1024px)'],
  ['huge', 'screen and (min-width: 1025px)'],
  ['tablet', 'tablet media query']


If you need to filter out the numerical breakpoints from a mixed object you can use getBreakPoints e.g.

will return
  small: 300,
  medium: 600,
  big: 1024,
  huge: Infinity // remember that Infinity is a number


In the same way you may need to filter out all the custom strings e.g.

will return
  tablet: 'tablet media query'