loader conventions

extension	semantic	loader examples
.js	returns module exports	nothing
.coffee	returns module exports	coffee-loader coffee-redux-loader
.jsx	returns module exports (react component)	jsx-loader react-hot-loader!jsx-loader
.json .json5	returns json value	json-loader json5-loader
.txt	return string value	raw-loader
.css	returns nothing, side effect of adding style to DOM	style-loader!css-loader style-loader!css-loader!autoprefixer-loader
.less	returns nothing, side effect of adding style to DOM	style-loader!css-loader!less-loader
.scss	returns nothing, side effect of adding style to DOM	style-loader!css-loader!scss-loader
.styl	returns nothing, side effect of adding style to DOM	style-loader!css-loader!stylus-loader
.png .jpg .jpeg .gif .svg	returns url to image	file-loader url-loader
.woff .ttf	returns url to font	file-loader url-loader
.wav .mp3	returns url to audio	file-loader url-loader
.mpeg .mp4 .webm .ogv	returns url to video	file-loader
.html	returns HTML as string	html-loader
.md .markdown	returns HTML as string	html-loader!markdown-loader
.jade	returns template function	jade-loader
.hbs .handlebars	returns template function	handlebars-loader