webpack/lib/HotModuleReplacement.runtime.js at temp · JavaScriptExample/webpack

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MIT License http://www.opensource.org/licenses/mit-license.php

Author Tobias Koppers @sokra

/*global $hash$ $requestTimeout$ installedModules $require$ hotDownloadManifest hotDownloadUpdateChunk hotDisposeChunk modules */

module.exports = function() {

var hotApplyOnUpdate = true;

var hotCurrentHash = $hash$; // eslint-disable-line no-unused-vars

var hotRequestTimeout = $requestTimeout$;

var hotCurrentModuleData = {};

var hotCurrentChildModule; // eslint-disable-line no-unused-vars

var hotCurrentParents = []; // eslint-disable-line no-unused-vars

var hotCurrentParentsTemp = []; // eslint-disable-line no-unused-vars

function hotCreateRequire(moduleId) { // eslint-disable-line no-unused-vars

var me = installedModules[moduleId];

if(!me) return $require$;

var fn = function(request) {

if(me.hot.active) {

if(installedModules[request]) {

if(!installedModules[request].parents.includes(moduleId))

installedModules[request].parents.push(moduleId);

} else {

hotCurrentParents = [moduleId];

hotCurrentChildModule = request;

}

if(!me.children.includes(request))

me.children.push(request);

} else {

console.warn("[HMR] unexpected require(" + request + ") from disposed module " + moduleId);

hotCurrentParents = [];

}

return $require$(request);

};

var ObjectFactory = function ObjectFactory(name) {

return {

configurable: true,

enumerable: true,

get: function() {

return $require$[name];

set: function(value) {

$require$[name] = value;

}

};

for(var name in $require$) {

if(Object.prototype.hasOwnProperty.call($require$, name) && name !== "e") {

Object.defineProperty(fn, name, ObjectFactory(name));

}

fn.e = function(chunkId) {

if(hotStatus === "ready")

hotSetStatus("prepare");

hotChunksLoading++;

return $require$.e(chunkId).then(finishChunkLoading, function(err) {

finishChunkLoading();

throw err;

});

function finishChunkLoading() {

hotChunksLoading--;

if(hotStatus === "prepare") {

if(!hotWaitingFilesMap[chunkId]) {

hotEnsureUpdateChunk(chunkId);

}

if(hotChunksLoading === 0 && hotWaitingFiles === 0) {

hotUpdateDownloaded();

}

};

return fn;

}

function hotCreateModule(moduleId) { // eslint-disable-line no-unused-vars

var hot = {

// private stuff

_acceptedDependencies: {},

_declinedDependencies: {},

_selfAccepted: false,

_selfDeclined: false,

_disposeHandlers: [],

_main: hotCurrentChildModule !== moduleId,

// Module API

active: true,

accept: function(dep, callback) {

if(typeof dep === "undefined")

hot._selfAccepted = true;

else if(typeof dep === "function")

hot._selfAccepted = dep;

else if(typeof dep === "object")

for(var i = 0; i < dep.length; i++)

hot._acceptedDependencies[dep[i]] = callback || function() {};

else

hot._acceptedDependencies[dep] = callback || function() {};

decline: function(dep) {

if(typeof dep === "undefined")

hot._selfDeclined = true;

else if(typeof dep === "object")

for(var i = 0; i < dep.length; i++)

hot._declinedDependencies[dep[i]] = true;

else

hot._declinedDependencies[dep] = true;

dispose: function(callback) {

hot._disposeHandlers.push(callback);

addDisposeHandler: function(callback) {

hot._disposeHandlers.push(callback);

removeDisposeHandler: function(callback) {

var idx = hot._disposeHandlers.indexOf(callback);

if(idx >= 0) hot._disposeHandlers.splice(idx, 1);

// Management API

check: hotCheck,

apply: hotApply,

status: function(l) {

if(!l) return hotStatus;

hotStatusHandlers.push(l);

addStatusHandler: function(l) {

hotStatusHandlers.push(l);

removeStatusHandler: function(l) {

var idx = hotStatusHandlers.indexOf(l);

if(idx >= 0) hotStatusHandlers.splice(idx, 1);

//inherit from previous dispose call

data: hotCurrentModuleData[moduleId]

};

hotCurrentChildModule = undefined;

return hot;

}

var hotStatusHandlers = [];

var hotStatus = "idle";

function hotSetStatus(newStatus) {

hotStatus = newStatus;

for(var i = 0; i < hotStatusHandlers.length; i++)

hotStatusHandlers[i].call(null, newStatus);

}

// while downloading

var hotWaitingFiles = 0;

var hotChunksLoading = 0;

var hotWaitingFilesMap = {};

var hotRequestedFilesMap = {};

var hotAvailableFilesMap = {};

var hotDeferred;

// The update info

var hotUpdate, hotUpdateNewHash;

function toModuleId(id) {

var isNumber = (+id) + "" === id;

return isNumber ? +id : id;

}

function hotCheck(apply) {

if(hotStatus !== "idle") throw new Error("check() is only allowed in idle status");

hotApplyOnUpdate = apply;

hotSetStatus("check");

return hotDownloadManifest(hotRequestTimeout).then(function(update) {

if(!update) {

hotSetStatus("idle");

return null;

}

hotRequestedFilesMap = {};

hotWaitingFilesMap = {};

hotAvailableFilesMap = update.c;

hotUpdateNewHash = update.h;

hotSetStatus("prepare");

var promise = new Promise(function(resolve, reject) {

hotDeferred = {

resolve: resolve,

reject: reject

};

});

hotUpdate = {};

/*foreachInstalledChunks*/

{ // eslint-disable-line no-lone-blocks

/*globals chunkId */

hotEnsureUpdateChunk(chunkId);

}

if(hotStatus === "prepare" && hotChunksLoading === 0 && hotWaitingFiles === 0) {

hotUpdateDownloaded();

}

return promise;

});

}

function hotAddUpdateChunk(chunkId, moreModules) { // eslint-disable-line no-unused-vars

if(!hotAvailableFilesMap[chunkId] || !hotRequestedFilesMap[chunkId])

return;

hotRequestedFilesMap[chunkId] = false;

for(var moduleId in moreModules) {

if(Object.prototype.hasOwnProperty.call(moreModules, moduleId)) {

hotUpdate[moduleId] = moreModules[moduleId];

}

if(--hotWaitingFiles === 0 && hotChunksLoading === 0) {

hotUpdateDownloaded();

}

function hotEnsureUpdateChunk(chunkId) {

if(!hotAvailableFilesMap[chunkId]) {

hotWaitingFilesMap[chunkId] = true;

} else {

hotRequestedFilesMap[chunkId] = true;

hotWaitingFiles++;

hotDownloadUpdateChunk(chunkId);

}

function hotUpdateDownloaded() {

hotSetStatus("ready");

var deferred = hotDeferred;

hotDeferred = null;

if(!deferred) return;

if(hotApplyOnUpdate) {

// Wrap deferred object in Promise to mark it as a well-handled Promise to

// avoid triggering uncaught exception warning in Chrome.

// See https://bugs.chromium.org/p/chromium/issues/detail?id=465666

Promise.resolve().then(function() {

return hotApply(hotApplyOnUpdate);

}).then(

function(result) {

deferred.resolve(result);

function(err) {

deferred.reject(err);

}

);

} else {

var outdatedModules = [];

for(var id in hotUpdate) {

if(Object.prototype.hasOwnProperty.call(hotUpdate, id)) {

outdatedModules.push(toModuleId(id));

}

deferred.resolve(outdatedModules);

}

function hotApply(options) {

if(hotStatus !== "ready") throw new Error("apply() is only allowed in ready status");

options = options || {};

var cb;

var i;

var j;

var module;

var moduleId;

function getAffectedStuff(updateModuleId) {

var outdatedModules = [updateModuleId];

var outdatedDependencies = {};

var queue = outdatedModules.slice().map(function(id) {

return {

chain: [id],

id: id

};

});

while(queue.length > 0) {

var queueItem = queue.pop();

var moduleId = queueItem.id;

var chain = queueItem.chain;

module = installedModules[moduleId];

if(!module || module.hot._selfAccepted)

continue;

if(module.hot._selfDeclined) {

return {

type: "self-declined",

chain: chain,

moduleId: moduleId

};

}

if(module.hot._main) {

return {

type: "unaccepted",

chain: chain,

moduleId: moduleId

};

}

for(var i = 0; i < module.parents.length; i++) {

var parentId = module.parents[i];

var parent = installedModules[parentId];

if(!parent) continue;

if(parent.hot._declinedDependencies[moduleId]) {

return {

type: "declined",

chain: chain.concat([parentId]),

moduleId: moduleId,

parentId: parentId

};

}

if(outdatedModules.includes(parentId)) continue;

if(parent.hot._acceptedDependencies[moduleId]) {

if(!outdatedDependencies[parentId])

outdatedDependencies[parentId] = [];

addAllToSet(outdatedDependencies[parentId], [moduleId]);

continue;

}

delete outdatedDependencies[parentId];

outdatedModules.push(parentId);

queue.push({

chain: chain.concat([parentId]),

id: parentId

});

}

return {

type: "accepted",

moduleId: updateModuleId,

outdatedModules: outdatedModules,

outdatedDependencies: outdatedDependencies

};

}

function addAllToSet(a, b) {

for(var i = 0; i < b.length; i++) {

var item = b[i];

if(!a.includes(item))

a.push(item);

}

// at begin all updates modules are outdated

// the "outdated" status can propagate to parents if they don't accept the children

var outdatedDependencies = {};

var outdatedModules = [];

var appliedUpdate = {};

var warnUnexpectedRequire = function warnUnexpectedRequire() {

console.warn("[HMR] unexpected require(" + result.moduleId + ") to disposed module");

};

for(var id in hotUpdate) {

if(Object.prototype.hasOwnProperty.call(hotUpdate, id)) {

moduleId = toModuleId(id);

var result;

if(hotUpdate[id]) {

result = getAffectedStuff(moduleId);

} else {

result = {

type: "disposed",

moduleId: id

};

}

var abortError = false;

var doApply = false;

var doDispose = false;

var chainInfo = "";

if(result.chain) {

chainInfo = "\nUpdate propagation: " + result.chain.join(" -> ");

}

switch(result.type) {

case "self-declined":

if(options.onDeclined)

options.onDeclined(result);

if(!options.ignoreDeclined)

abortError = new Error("Aborted because of self decline: " + result.moduleId + chainInfo);

break;

case "declined":

if(options.onDeclined)

options.onDeclined(result);

if(!options.ignoreDeclined)

abortError = new Error("Aborted because of declined dependency: " + result.moduleId + " in " + result.parentId + chainInfo);

break;

case "unaccepted":

if(options.onUnaccepted)

options.onUnaccepted(result);

if(!options.ignoreUnaccepted)

abortError = new Error("Aborted because " + moduleId + " is not accepted" + chainInfo);

break;

case "accepted":

if(options.onAccepted)

options.onAccepted(result);

doApply = true;

break;

case "disposed":

if(options.onDisposed)

options.onDisposed(result);

doDispose = true;

break;

default:

throw new Error("Unexception type " + result.type);

}

if(abortError) {

hotSetStatus("abort");

return Promise.reject(abortError);

}

if(doApply) {

appliedUpdate[moduleId] = hotUpdate[moduleId];

addAllToSet(outdatedModules, result.outdatedModules);

for(moduleId in result.outdatedDependencies) {

if(Object.prototype.hasOwnProperty.call(result.outdatedDependencies, moduleId)) {

if(!outdatedDependencies[moduleId])

outdatedDependencies[moduleId] = [];

addAllToSet(outdatedDependencies[moduleId], result.outdatedDependencies[moduleId]);

}

if(doDispose) {

addAllToSet(outdatedModules, [result.moduleId]);

appliedUpdate[moduleId] = warnUnexpectedRequire;

}

// Store self accepted outdated modules to require them later by the module system

var outdatedSelfAcceptedModules = [];

for(i = 0; i < outdatedModules.length; i++) {

moduleId = outdatedModules[i];

if(installedModules[moduleId] && installedModules[moduleId].hot._selfAccepted)

outdatedSelfAcceptedModules.push({

module: moduleId,

errorHandler: installedModules[moduleId].hot._selfAccepted

});

}

// Now in "dispose" phase

hotSetStatus("dispose");

Object.keys(hotAvailableFilesMap).forEach(function(chunkId) {

if(hotAvailableFilesMap[chunkId] === false) {

hotDisposeChunk(chunkId);

}

});

var idx;

var queue = outdatedModules.slice();

while(queue.length > 0) {

moduleId = queue.pop();

module = installedModules[moduleId];

if(!module) continue;

var data = {};

// Call dispose handlers

var disposeHandlers = module.hot._disposeHandlers;

for(j = 0; j < disposeHandlers.length; j++) {

cb = disposeHandlers[j];

cb(data);

}

hotCurrentModuleData[moduleId] = data;

// disable module (this disables requires from this module)

module.hot.active = false;

// remove module from cache

delete installedModules[moduleId];

// when disposing there is no need to call dispose handler

delete outdatedDependencies[moduleId];

// remove "parents" references from all children

for(j = 0; j < module.children.length; j++) {

var child = installedModules[module.children[j]];

if(!child) continue;

idx = child.parents.indexOf(moduleId);

if(idx >= 0) {

child.parents.splice(idx, 1);

}

// remove outdated dependency from module children

var dependency;

var moduleOutdatedDependencies;

for(moduleId in outdatedDependencies) {

if(Object.prototype.hasOwnProperty.call(outdatedDependencies, moduleId)) {

module = installedModules[moduleId];

if(module) {

moduleOutdatedDependencies = outdatedDependencies[moduleId];

for(j = 0; j < moduleOutdatedDependencies.length; j++) {

dependency = moduleOutdatedDependencies[j];

idx = module.children.indexOf(dependency);

if(idx >= 0) module.children.splice(idx, 1);

}

// Not in "apply" phase

hotSetStatus("apply");

hotCurrentHash = hotUpdateNewHash;

// insert new code

for(moduleId in appliedUpdate) {

if(Object.prototype.hasOwnProperty.call(appliedUpdate, moduleId)) {

modules[moduleId] = appliedUpdate[moduleId];

}

// call accept handlers

var error = null;

for(moduleId in outdatedDependencies) {

if(Object.prototype.hasOwnProperty.call(outdatedDependencies, moduleId)) {

module = installedModules[moduleId];

if(module) {

moduleOutdatedDependencies = outdatedDependencies[moduleId];

var callbacks = [];

for(i = 0; i < moduleOutdatedDependencies.length; i++) {

dependency = moduleOutdatedDependencies[i];

cb = module.hot._acceptedDependencies[dependency];

if(cb) {

if(callbacks.includes(cb)) continue;

callbacks.push(cb);

}

for(i = 0; i < callbacks.length; i++) {

cb = callbacks[i];

try {

cb(moduleOutdatedDependencies);

} catch(err) {

if(options.onErrored) {

options.onErrored({

type: "accept-errored",

moduleId: moduleId,

dependencyId: moduleOutdatedDependencies[i],

error: err

});

}

if(!options.ignoreErrored) {

if(!error)

error = err;

}

// Load self accepted modules

for(i = 0; i < outdatedSelfAcceptedModules.length; i++) {

var item = outdatedSelfAcceptedModules[i];

moduleId = item.module;

hotCurrentParents = [moduleId];

try {

$require$(moduleId);

} catch(err) {

if(typeof item.errorHandler === "function") {

try {

item.errorHandler(err);

} catch(err2) {

if(options.onErrored) {

options.onErrored({

type: "self-accept-error-handler-errored",

moduleId: moduleId,

error: err2,

originalError: err

});

}

if(!options.ignoreErrored) {

if(!error)

error = err2;

}

if(!error)

error = err;

}

} else {

if(options.onErrored) {

options.onErrored({

type: "self-accept-errored",

moduleId: moduleId,

error: err

});

}

if(!options.ignoreErrored) {

if(!error)

error = err;

}

// handle errors in accept handlers and self accepted module load

if(error) {

hotSetStatus("fail");

return Promise.reject(error);

}

hotSetStatus("idle");

return new Promise(function(resolve) {

resolve(outdatedModules);

});

}

};

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