evalmachine.<anonymous>:8 var elem = document.createElement('style'); ^ ReferenceError: document is not defined at module.exports (evalmachine.<anonymous>:8:16) at Object.2.insert-css (evalmachine.<anonymous>:28:39) at s (evalmachine.<anonymous>:1:254) at e (evalmachine.<anonymous>:1:425) at evalmachine.<anonymous>:1:443 at ContextifyScript.Script.runInNewContext (vm.js:18:15) at Object.exports.runInNewContext (vm.js:49:17) at parseBundle (/home/travis/build/stackcss/sheetify/test/prefix.js:43:10) at /home/travis/build/stackcss/sheetify/node_modules/browserify/index.js:776:13 at ConcatStream.<anonymous> (/home/travis/build/stackcss/sheetify/node_modules/concat-stream/index.js:36:43)