I propose exposing the private getEmValue() method, essentially adding it as an API option. I've updated the code to only do what's absolutely necessary to expose the method, then updated the documentation with a simple example.
I tested the updates with /test/test.html, successfully running respond.getEmValue() in the console.
Also, I've used this successfully to get ResponseJS to play nice with The Goldilocks Approach (Goldilocks demo), which uses EM media queries.
FYI, first time submitting a pull request and using github.
Exposed getEmValue method to allow other js to call respond.getEmValu…
…e to get the pixel value of 1 em
Updated API Options secion in the readme with the now exposed getEmVa…
Fixed a markdown bug.
Updated example of getEmValue() spacing from tabs to 2 spaces for rea…
Fixing another markdown issue
Going back to tabs instead of 2 spaces
Upadting the documentation with a link to response.js