mirror of https://github.com/webpack/webpack.git
404 lines
13 KiB
JavaScript
404 lines
13 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const Template = require("../Template");
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const SyncWaterfallHook = require("tapable").SyncWaterfallHook;
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class JsonpMainTemplatePlugin {
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apply(mainTemplate) {
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const needChunkOnDemandLoadingCode = chunk => {
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for (const chunkGroup of chunk.groupsIterable) {
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if (chunkGroup.getNumberOfChildren() > 0) return true;
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}
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return false;
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};
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const needChunkLoadingCode = chunk => {
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for (const chunkGroup of chunk.groupsIterable) {
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if (chunkGroup.chunks.length > 1) return true;
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if (chunkGroup.getNumberOfChildren() > 0) return true;
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}
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return false;
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};
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const needEntryDeferringCode = chunk => {
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for (const chunkGroup of chunk.groupsIterable) {
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if (chunkGroup.chunks.length > 1) return true;
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}
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return false;
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};
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// TODO refactor this
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if (!mainTemplate.hooks.jsonpScript) {
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mainTemplate.hooks.jsonpScript = new SyncWaterfallHook([
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"source",
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"chunk",
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"hash"
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]);
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}
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mainTemplate.hooks.localVars.tap(
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"JsonpMainTemplatePlugin",
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(source, chunk) => {
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if (needChunkLoadingCode(chunk)) {
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return Template.asString([
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source,
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"",
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"// object to store loaded and loading chunks",
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"var installedChunks = {",
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Template.indent(
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chunk.ids.map(id => `${JSON.stringify(id)}: 0`).join(",\n")
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),
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"};",
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"",
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needEntryDeferringCode(chunk) ? "var deferredModules = [];" : ""
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]);
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}
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return source;
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}
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);
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mainTemplate.hooks.jsonpScript.tap(
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"JsonpMainTemplatePlugin",
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(_, chunk, hash) => {
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const chunkFilename = mainTemplate.outputOptions.chunkFilename;
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const chunkMaps = chunk.getChunkMaps();
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const crossOriginLoading =
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mainTemplate.outputOptions.crossOriginLoading;
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const chunkLoadTimeout = mainTemplate.outputOptions.chunkLoadTimeout;
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const jsonpScriptType = mainTemplate.outputOptions.jsonpScriptType;
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const scriptSrcPath = mainTemplate.getAssetPath(
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JSON.stringify(chunkFilename),
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{
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hash: `" + ${mainTemplate.renderCurrentHashCode(hash)} + "`,
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hashWithLength: length =>
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`" + ${mainTemplate.renderCurrentHashCode(hash, length)} + "`,
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chunk: {
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id: '" + chunkId + "',
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hash: `" + ${JSON.stringify(chunkMaps.hash)}[chunkId] + "`,
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hashWithLength(length) {
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const shortChunkHashMap = Object.create(null);
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for (const chunkId of Object.keys(chunkMaps.hash)) {
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if (typeof chunkMaps.hash[chunkId] === "string")
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shortChunkHashMap[chunkId] = chunkMaps.hash[chunkId].substr(
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0,
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length
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);
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}
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return `" + ${JSON.stringify(shortChunkHashMap)}[chunkId] + "`;
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},
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name: `" + (${JSON.stringify(
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chunkMaps.name
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)}[chunkId]||chunkId) + "`
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}
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}
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);
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return Template.asString([
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"var script = document.createElement('script');",
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jsonpScriptType
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? `script.type = ${JSON.stringify(jsonpScriptType)};`
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: "",
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"script.charset = 'utf-8';",
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`script.timeout = ${chunkLoadTimeout};`,
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crossOriginLoading
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? `script.crossOrigin = ${JSON.stringify(crossOriginLoading)};`
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: "",
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`if (${mainTemplate.requireFn}.nc) {`,
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Template.indent(
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`script.setAttribute("nonce", ${mainTemplate.requireFn}.nc);`
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),
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"}",
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`script.src = ${mainTemplate.requireFn}.p + ${scriptSrcPath};`,
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"var timeout = setTimeout(function(){",
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Template.indent([
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"onScriptComplete({ type: 'timeout', target: script });"
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]),
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`}, ${chunkLoadTimeout});`,
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"script.onerror = script.onload = onScriptComplete;",
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"function onScriptComplete(event) {",
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Template.indent([
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"// avoid mem leaks in IE.",
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"script.onerror = script.onload = null;",
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"clearTimeout(timeout);",
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"var chunk = installedChunks[chunkId];",
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"if(chunk !== 0) {",
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Template.indent([
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"if(chunk) {",
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Template.indent([
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"var errorType = event && (event.type === 'load' ? 'missing' : event.type);",
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"var realSrc = event && event.target && event.target.src;",
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"var error = new Error('Loading chunk ' + chunkId + ' failed.\\n(' + errorType + ': ' + realSrc + ')');",
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"error.type = errorType;",
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"error.request = realSrc;",
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"chunk[1](error);"
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]),
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"}",
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"installedChunks[chunkId] = undefined;"
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]),
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"}"
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]),
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"};"
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]);
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}
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);
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mainTemplate.hooks.requireEnsure.tap(
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"JsonpMainTemplatePlugin",
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(source, chunk, hash) => {
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return Template.asString([
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source,
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"",
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"// JSONP chunk loading for javascript",
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"",
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"var installedChunkData = installedChunks[chunkId];",
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'if(installedChunkData !== 0) { // 0 means "already installed".',
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Template.indent([
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"",
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'// a Promise means "currently loading".',
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"if(installedChunkData) {",
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Template.indent(["promises.push(installedChunkData[2]);"]),
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"} else {",
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Template.indent([
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"// setup Promise in chunk cache",
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"var promise = new Promise(function(resolve, reject) {",
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Template.indent([
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"installedChunkData = installedChunks[chunkId] = [resolve, reject];"
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]),
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"});",
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"promises.push(installedChunkData[2] = promise);",
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"",
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"// start chunk loading",
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"var head = document.getElementsByTagName('head')[0];",
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mainTemplate.hooks.jsonpScript.call("", chunk, hash),
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"head.appendChild(script);"
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]),
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"}"
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]),
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"}"
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]);
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}
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);
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mainTemplate.hooks.requireExtensions.tap(
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"JsonpMainTemplatePlugin",
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(source, chunk) => {
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if (!needChunkOnDemandLoadingCode(chunk)) return source;
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return Template.asString([
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source,
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"",
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"// on error function for async loading",
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`${
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mainTemplate.requireFn
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}.oe = function(err) { console.error(err); throw err; };`
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]);
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}
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);
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mainTemplate.hooks.bootstrap.tap(
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"JsonpMainTemplatePlugin",
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(source, chunk, hash) => {
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if (needChunkLoadingCode(chunk)) {
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const withDefer = needEntryDeferringCode(chunk);
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return Template.asString([
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source,
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"",
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"// install a JSONP callback for chunk loading",
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"function webpackJsonpCallback(data) {",
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Template.indent([
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"var chunkIds = data[0];",
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"var moreModules = data[1]",
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withDefer ? "var executeModules = data[2];" : "",
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'// add "moreModules" to the modules object,',
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'// then flag all "chunkIds" as loaded and fire callback',
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"var moduleId, chunkId, i = 0, resolves = [];",
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"for(;i < chunkIds.length; i++) {",
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Template.indent([
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"chunkId = chunkIds[i];",
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"if(installedChunks[chunkId]) {",
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Template.indent("resolves.push(installedChunks[chunkId][0]);"),
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"}",
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"installedChunks[chunkId] = 0;"
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]),
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"}",
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"for(moduleId in moreModules) {",
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Template.indent([
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"if(Object.prototype.hasOwnProperty.call(moreModules, moduleId)) {",
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Template.indent(
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mainTemplate.renderAddModule(
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hash,
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chunk,
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"moduleId",
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"moreModules[moduleId]"
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)
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),
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"}"
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]),
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"}",
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"if(parentJsonpFunction) parentJsonpFunction(data);",
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"while(resolves.length) {",
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Template.indent("resolves.shift()();"),
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"}",
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withDefer
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? Template.asString([
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"",
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"// add entry modules from loaded chunk to deferred list",
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"deferredModules.push.apply(deferredModules, executeModules || []);",
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"",
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"// run deferred modules when all chunks ready",
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"return checkDeferredModules();"
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])
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: ""
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]),
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"};",
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withDefer
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? Template.asString([
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"function checkDeferredModules() {",
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Template.indent([
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"var result;",
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"for(var i = 0; i < deferredModules.length; i++) {",
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Template.indent([
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"var deferredModule = deferredModules[i];",
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"var fulfilled = true;",
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"for(var j = 1; j < deferredModule.length; j++) {",
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Template.indent([
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"var depId = deferredModule[j];",
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"if(installedChunks[depId] !== 0) fulfilled = false;"
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]),
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"}",
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"if(fulfilled) {",
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Template.indent([
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"deferredModules.splice(i--, 1);",
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"result = " +
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mainTemplate.requireFn +
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"(" +
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mainTemplate.requireFn +
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".s = deferredModule[0]);"
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]),
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"}"
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]),
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"}",
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"return result;"
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]),
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"}"
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])
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: ""
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]);
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}
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return source;
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}
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);
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mainTemplate.hooks.beforeStartup.tap(
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"JsonpMainTemplatePlugin",
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(source, chunk, hash) => {
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if (needChunkLoadingCode(chunk)) {
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var jsonpFunction = mainTemplate.outputOptions.jsonpFunction;
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var globalObject = mainTemplate.outputOptions.globalObject;
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return Template.asString([
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`var jsonpArray = ${globalObject}[${JSON.stringify(
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jsonpFunction
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)}] = ${globalObject}[${JSON.stringify(jsonpFunction)}] || [];`,
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"var oldJsonpFunction = jsonpArray.push.bind(jsonpArray);",
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"jsonpArray.push = webpackJsonpCallback;",
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"jsonpArray = jsonpArray.slice();",
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"for(var i = 0; i < jsonpArray.length; i++) webpackJsonpCallback(jsonpArray[i]);",
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"var parentJsonpFunction = oldJsonpFunction;",
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"",
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source
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]);
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}
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return source;
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}
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);
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mainTemplate.hooks.startup.tap(
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"JsonpMainTemplatePlugin",
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(source, chunk, hash) => {
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if (needEntryDeferringCode(chunk)) {
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if (chunk.hasEntryModule()) {
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const entries = [chunk.entryModule].filter(Boolean).map(m =>
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[m.id].concat(
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Array.from(chunk.groupsIterable)[0]
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.chunks.filter(c => c !== chunk)
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.map(c => c.id)
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)
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);
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return Template.asString([
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"// add entry module to deferred list",
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`deferredModules.push(${entries
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.map(e => JSON.stringify(e))
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.join(", ")});`,
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"// run deferred modules when ready",
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"return checkDeferredModules();"
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]);
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} else {
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return Template.asString([
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"// run deferred modules from other chunks",
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"checkDeferredModules();"
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]);
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}
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}
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return source;
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}
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);
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mainTemplate.hooks.hotBootstrap.tap(
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"JsonpMainTemplatePlugin",
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(source, chunk, hash) => {
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const globalObject = mainTemplate.outputOptions.globalObject;
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const hotUpdateChunkFilename =
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mainTemplate.outputOptions.hotUpdateChunkFilename;
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const hotUpdateMainFilename =
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mainTemplate.outputOptions.hotUpdateMainFilename;
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const crossOriginLoading =
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mainTemplate.outputOptions.crossOriginLoading;
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const hotUpdateFunction = mainTemplate.outputOptions.hotUpdateFunction;
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const currentHotUpdateChunkFilename = mainTemplate.getAssetPath(
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JSON.stringify(hotUpdateChunkFilename),
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{
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hash: `" + ${mainTemplate.renderCurrentHashCode(hash)} + "`,
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hashWithLength: length =>
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`" + ${mainTemplate.renderCurrentHashCode(hash, length)} + "`,
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chunk: {
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id: '" + chunkId + "'
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}
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}
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);
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const currentHotUpdateMainFilename = mainTemplate.getAssetPath(
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JSON.stringify(hotUpdateMainFilename),
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{
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hash: `" + ${mainTemplate.renderCurrentHashCode(hash)} + "`,
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hashWithLength: length =>
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`" + ${mainTemplate.renderCurrentHashCode(hash, length)} + "`
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}
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);
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const runtimeSource = Template.getFunctionContent(
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require("./JsonpMainTemplate.runtime.js")
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)
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.replace(/\/\/\$semicolon/g, ";")
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.replace(/\$require\$/g, mainTemplate.requireFn)
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.replace(
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/\$crossOriginLoading\$/g,
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crossOriginLoading
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? `script.crossOrigin = ${JSON.stringify(crossOriginLoading)}`
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: ""
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)
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.replace(/\$hotMainFilename\$/g, currentHotUpdateMainFilename)
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.replace(/\$hotChunkFilename\$/g, currentHotUpdateChunkFilename)
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.replace(/\$hash\$/g, JSON.stringify(hash));
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return `${source}
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function hotDisposeChunk(chunkId) {
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delete installedChunks[chunkId];
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}
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var parentHotUpdateCallback = ${globalObject}[${JSON.stringify(
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hotUpdateFunction
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)}];
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${globalObject}[${JSON.stringify(hotUpdateFunction)}] = ${runtimeSource}`;
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}
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);
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mainTemplate.hooks.hash.tap("JsonpMainTemplatePlugin", hash => {
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hash.update("jsonp");
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hash.update("5");
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hash.update(`${mainTemplate.outputOptions.globalObject}`);
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hash.update(`${mainTemplate.outputOptions.chunkFilename}`);
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hash.update(`${mainTemplate.outputOptions.jsonpFunction}`);
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hash.update(`${mainTemplate.outputOptions.hotUpdateFunction}`);
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});
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}
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}
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module.exports = JsonpMainTemplatePlugin;
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