webpack/examples/require.resolve/README.md

example.js

var a = require("./a");

// get module id
var aId = require.resolve("./a.js");

// clear module in require.cache
delete require.cache[aId];

// require module again, it should be reexecuted
var a2 = require("./a");

// vertify it
if(a == a2) throw new Error("Cache clear failed :(");

a.js

module.exports = Math.random();

js/output.js

(function(modules) { // webpackBootstrap
// The module cache
var installedModules = {};

// The require function
function require(moduleId) {
	// Check if module is in cache
	if(installedModules[moduleId])
		return installedModules[moduleId].exports;
	
	// Create a new module (and put it into the cache)
	var module = installedModules[moduleId] = {
		exports: {},
		id: moduleId,
		loaded: false
	};
	
	// Execute the module function
	modules[moduleId].call(null, module, module.exports, require);
	
	// Flag the module as loaded
	module.loaded = true;
	
	// Return the exports of the module
	return module.exports;
}

require.e = function requireEnsure(_, callback) {
	callback.call(null, require);
};
require.modules = modules;
require.cache = installedModules;


// Load entry module and return exports
return require(0);
})
/************************************************************************/
({
// __webpack_public_path__

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

var a = require(/*! ./a */ 1);

// get module id
var aId = /*require.resolve*/(/*! ./a.js */ 1);

// clear module in require.cache
delete require.cache[aId];

// require module again, it should be reexecuted
var a2 = require(/*! ./a */ 1);

// vertify it
if(a == a2) throw new Error("Cache clear failed :(");

/***/ },

/***/ 1:
/*!**************!*\
  !*** ./a.js ***!
  \**************/
/***/ function(module, exports, require) {

module.exports = Math.random();

/***/ }
})

Info

Uncompressed

Hash: f180ba3e87e5894643306820cbd115dc
Version: webpack 0.10.0-beta1
Time: 32ms
    Asset  Size  Chunks  Chunk Names
output.js  1559       0  main       
chunk    {0} output.js (main) 326
    [0] ./example.js 295 [built] {0}
    [1] ./a.js 31 [built] {0}
        require.resolve ./a.js [0] ./example.js 4:10-35
        cjs require ./a [0] ./example.js 1:8-22
        cjs require ./a [0] ./example.js 10:9-23

Minimized (uglify-js, no zip)

Hash: f180ba3e87e5894643306820cbd115dc
Version: webpack 0.10.0-beta1
Time: 81ms
    Asset  Size  Chunks  Chunk Names
output.js   387       0  main       
chunk    {0} output.js (main) 326
    [0] ./example.js 295 [built] {0}
    [1] ./a.js 31 [built] {0}
        require.resolve ./a.js [0] ./example.js 4:10-35
        cjs require ./a [0] ./example.js 1:8-22
        cjs require ./a [0] ./example.js 10:9-23