var css = require("css!./file.css");
// => returns css code from file.css, resolves imports and url(...)@import will be required with this css loader.
url(...) will be required with the loader specified in the options.
If options.css.requireUrl is a string it will be prefixed to the required url.
If it isn't a string url(...) will not be replaced.
options.css.requireUrl defaults to "file/auto!".
A alternative to the file-loader is the
url-loader which can use Data Urls.
The use it specify "url/auto!".
Don't forget to polyfill require if you want to use it in node.
See webpack documentation.