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loader

README.md

example.js

// use our loader
console.dir(require("./loader!./file"));

// use buildin json loader
console.dir(require("./test.json")); // default by extension
console.dir(require("!json!./test.json")); // manual

file.js

exports.foo = "bar";

loader.js

module.exports = function(content) {
	return "exports.answer = 42;\n" + content;
}

test.json

{
	"foobar": 1234
}

js/output.js

/******/ (function webpackBootstrap(modules) {
/******/ 	var installedModules = {};
/******/ 	function require(moduleId) {
/******/ 		if(installedModules[moduleId])
/******/ 			return installedModules[moduleId].exports;
/******/ 		var module = installedModules[moduleId] = {
/******/ 			exports: {},
/******/ 			id: moduleId,
/******/ 			loaded: false
/******/ 		};
/******/ 		modules[moduleId].call(null, module, module.exports, require);
/******/ 		module.loaded = true;
/******/ 		return module.exports;
/******/ 	}
/******/ 	require.e = function requireEnsure(chunkId, callback) {
/******/ 		callback.call(null, require);
/******/ 	};
/******/ 	require.modules = modules;
/******/ 	require.cache = installedModules;
/******/ 	return require(0);
/******/ })({
/******/ c: "",

/***/ 0:
/*!********************!*\
  !*** ./example.js ***!
  \********************/
/***/ function(module, exports, require) {

	// use our loader
	console.dir(require(/*! ./loader!./file */ 2));
	
	// use buildin json loader
	console.dir(require(/*! ./test.json */ 1)); // default by extension
	console.dir(require(/*! json!./test.json */ 1)); // manual

/***/ },

/***/ 1:
/*!************************************************************************************!*\
  !*** (webpack)/~/json-loader!./test.json ***!
  \************************************************************************************/
/***/ function(module, exports, require) {

	module.exports = {
		"foobar": 1234
	}

/***/ },

/***/ 2:
/*!*****************************!*\
  !*** ./loader.js!./file.js ***!
  \*****************************/
/***/ function(module, exports, require) {

	exports.answer = 42;
	exports.foo = "bar";

/***/ }
/******/ })

Console output

Prints in node.js (enhanced-require example.js) and in browser:

{ answer: 42, foo: 'bar' }
{ foobar: 1234 }
{ foobar: 1234 }

Info

Uncompressed

Hash: 2f64cd43907e15c39cc8d84534efe0a2
Time: 50ms
    Asset  Size  Chunks  Chunk Names
output.js  1743       0  main       
chunk    {0} output.js (main) 282
    [0] ./example.js 205 [built] {0}
    [1] (webpack)/~/json-loader!./test.json 36 [built] {0}
        cjs require ./test.json [0] ./example.js 5:12-34
        cjs require !json!./test.json [0] ./example.js 6:12-40
    [2] ./loader.js!./file.js 41 [not cacheable] [built] {0}
        cjs require ./loader!./file [0] ./example.js 2:12-38