checkMQ

checkMQ utilises matchMedia event listeners to provide you with access to media queries in JavaScript as you would in CSS.

Usage

Include checkMQ in your project. You can either use the script in the traditional method like so:

<script src="checkMQ.min.js"></script>

or use requireJS, webpack etc like so:

var checkMQ = require('checkmq.min.js');

If using NPM to manage dependencies you can do the following:

npm install checkmq

Each function that needs access the defined media queries should have theMQ passed through as a parameter. The value of theMQ will change when it matches one of the predefined media queries.

var testFunction = function (theMQ) {
 
  if (theMQ === 'mqCore') {
    console.log('mqCore');
  } else if (theMQ === 'mq600') {
    console.log('mq600');
  } else if (theMQ === 'mq768') {
    console.log('mq768');
  } else if (theMQ === 'mq960') {
    console.log('mq960');
  } else if(theMQ === 'mq1200') {
    console.log('mq1200');
  }
 
};
 
var anotherTestFunction = function (theMQ) {
 
  if (theMQ === 'mqCore') {
    alert('this is a small screen device');
  }
 
};

Each function that requires access to theMQ must be passed the addFunctions method which adds the appropraite matchMedia listeners. It's important that this is the last method called.

checkMQ.addFunctions([
  testFunction,
  anotherTestFunction
]);

Browser support

• Internet Explorer 10+
• Firefox 10+
• Chrome 9+
• Safari 5.1+
• Opera 12.1+

For IE 9 support you can use Weblinc's Media.match Polyfill.

TODO

• Improve the method of definining media queries so they can become dynamic

Changelog

• 21/12/15: 2.0.0 - Major rewrite using ES6.
• 01/07/15: 1.3.1 - Tidied up the code and fixed the timing issue in <= IE10
• 18/06/15: 1.2.0 - Converting to an Node.js module and updating README to include instructions for this
• 26/03/15: 1.1.1 - Updated README to be more clear on how it works
• 18/03/15: 1.1.0 - Fixing missing bracket on doc ready function and bumping version number to account for rewritten code
• 18/03/15: 1.0.6 – Removing forEach method and using a 'for' loop as it's replacement for wider browser support
• 16/03/15: 1.0.5 – Updating README
• 13/03/15: 1.0.4 – Fixing broken module code
• 13/03/15: 1.0.3 – Fixing package.json
• 13/03/15: 1.0.2 – Code tidy up to fix Travis issues
• 13/03/15: 1.0.0 – First major release: registered as a Bower plugin.