resolutiondppx

Get the pixel-based resolution of the host device.

resolutiondppx

(c)[Bumblehead][0], 2013 MIT-license

Get the pixel-based resolution of the host device.

Include this script and then do something like this:

console.log("device resolution is " + resolutiondppx);
// device resolution is 1 

More Information:

device resolution is obtained differently depending upon the browser (webkit or non-webkit).

Webkit supports pixel-based resolutions (dots per pixel, dppx, dots/pixel). The W3C added standards for pixel-based resolution styles and newer browsers support them but not the same way webkit does.

Webkit script environments provide easy access to device resolution:

resolution = window.devicePixelRatio;

Other browsers don't provide this. They do support matchmedia and it may be used to obtain a similar value.

Example devicePixelRatio values are 1, 2 and 2.25. These values are used in the examples in this document.

This script is understood easily by viewing its source.


INSTALL:

resolutiondppx may be downloaded directly or installed through npm.

  • npm
$ npm install resolutiondppx
  • Direct Download
$ git clone https://github.com/iambumblehead/resolutiondppx.git
$ cd resolutiondppx && npm install

If you coerce resolutiondppx into a string value, you'll get the device resolution.

console.log("device resolution is " + resolutiondppx);
// device resolution is 1 
console.log("" + resolutiondppx);
// 1 
console.log("resolution is :res".replace(/:res/, resolutiondppx);
// resolution is 1 

License:

(The MIT License)

Copyright (c) 2012 [Bumblehead][0] chris@bumblehead.com

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.