JsonpMainTemplatePlugin.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const Template = require("webpack/lib/Template");
class JsonpMainTemplatePlugin {
apply(mainTemplate) {
mainTemplate.plugin("local-vars", function(source, chunk) {
if(chunk.chunks.length > 0) {
return this.asString([
source,
"",
"// objects to store loaded and loading chunks",
"var installedChunks = {",
this.indent(
chunk.ids.map(id => `${JSON.stringify(id)}: 0`).join(",\n")
),
"};"
]);
}
return source;
});
mainTemplate.plugin("jsonp-script", function(_, chunk, hash) {
const chunkFilename = this.outputOptions.chunkFilename;
const chunkMaps = chunk.getChunkMaps();
const crossOriginLoading = this.outputOptions.crossOriginLoading;
const chunkLoadTimeout = this.outputOptions.chunkLoadTimeout;
const scriptSrcPath = this.applyPluginsWaterfall("asset-path", JSON.stringify(chunkFilename), {
hash: `" + ${this.renderCurrentHashCode(hash)} + "`,
hashWithLength: length => `" + ${this.renderCurrentHashCode(hash, length)} + "`,
chunk: {
id: "\" + chunkId + \"",
hash: `" + ${JSON.stringify(chunkMaps.hash)}[chunkId] + "`,
hashWithLength(length) {
const shortChunkHashMap = Object.create(null);
Object.keys(chunkMaps.hash).forEach(chunkId => {
if(typeof chunkMaps.hash[chunkId] === "string")
shortChunkHashMap[chunkId] = chunkMaps.hash[chunkId].substr(0, length);
});
return `" + ${JSON.stringify(shortChunkHashMap)}[chunkId] + "`;
},
name: `" + (${JSON.stringify(chunkMaps.name)}[chunkId]||chunkId) + "`
}
});
return this.asString([
"var script = document.createElement('script');",
"script.type = 'text/javascript';",
"script.charset = 'utf-8';",
"script.async = true;",
`script.timeout = ${chunkLoadTimeout};`,
crossOriginLoading ? `script.crossOrigin = ${JSON.stringify(crossOriginLoading)};` : "",
`if (${this.requireFn}.nc) {`,
this.indent(`script.setAttribute("nonce", ${this.requireFn}.nc);`),
"}",
`script.src = ${this.requireFn}.p + ${scriptSrcPath};`,
`var timeout = setTimeout(onScriptComplete, ${chunkLoadTimeout});`,
"script.onerror = script.onload = onScriptComplete;",
"function onScriptComplete() {",
this.indent([
"// avoid mem leaks in IE.",
"script.onerror = script.onload = null;",
"clearTimeout(timeout);",
"var chunk = installedChunks[chunkId];",
"if(chunk !== 0) {",
this.indent([
"if(chunk) {",
this.indent("chunk[1](new Error('Loading chunk ' + chunkId + ' failed.'));"),
"}",
"installedChunks[chunkId] = undefined;"
]),
"}"
]),
"};",
]);
});
mainTemplate.plugin("require-ensure", function(_, chunk, hash) {
return this.asString([
"var installedChunkData = installedChunks[chunkId];",
"if(installedChunkData === 0) {",
this.indent([
"return new Promise(function(resolve) { resolve(); });"
]),
"}",
"",
"// a Promise means \"currently loading\".",
"if(installedChunkData) {",
this.indent([
"return installedChunkData[2];"
]),
"}",
"",
"// setup Promise in chunk cache",
"var promise = new Promise(function(resolve, reject) {",
this.indent([
"installedChunkData = installedChunks[chunkId] = [resolve, reject];"
]),
"});",
"installedChunkData[2] = promise;",
"",
"// start chunk loading",
"var head = document.getElementsByTagName('head')[0];",
this.applyPluginsWaterfall("jsonp-script", "", chunk, hash),
"head.appendChild(script);",
"",
"return promise;"
]);
});
mainTemplate.plugin("require-extensions", function(source, chunk) {
if(chunk.chunks.length === 0) return source;
return this.asString([
source,
"",
"// on error function for async loading",
`${this.requireFn}.oe = function(err) { console.error(err); throw err; };`
]);
});
mainTemplate.plugin("bootstrap", function(source, chunk, hash) {
if(chunk.chunks.length > 0) {
var jsonpFunction = this.outputOptions.jsonpFunction;
return this.asString([
source,
"",
"// install a JSONP callback for chunk loading",
`var parentJsonpFunction = global[${JSON.stringify(jsonpFunction)}];`,
`global[${JSON.stringify(jsonpFunction)}] = function webpackJsonpCallback(chunkIds, moreModules, executeModules) {`,
this.indent([
"// add \"moreModules\" to the modules object,",
"// then flag all \"chunkIds\" as loaded and fire callback",
"var moduleId, chunkId, i = 0, resolves = [], result;",
"for(;i < chunkIds.length; i++) {",
this.indent([
"chunkId = chunkIds[i];",
"if(installedChunks[chunkId]) {",
this.indent("resolves.push(installedChunks[chunkId][0]);"),
"}",
"installedChunks[chunkId] = 0;"
]),
"}",
"for(moduleId in moreModules) {",
this.indent([
"if(Object.prototype.hasOwnProperty.call(moreModules, moduleId)) {",
this.indent(this.renderAddModule(hash, chunk, "moduleId", "moreModules[moduleId]")),
"}"
]),
"}",
"if(parentJsonpFunction) parentJsonpFunction(chunkIds, moreModules, executeModules);",
"while(resolves.length) {",
this.indent("resolves.shift()();"),
"}",
this.entryPointInChildren(chunk) ? [
"if(executeModules) {",
this.indent([
"for(i=0; i < executeModules.length; i++) {",
this.indent(`result = ${this.requireFn}(${this.requireFn}.s = executeModules[i]);`),
"}"
]),
"}",
"return result;",
] : ""
]),
"};"
]);
}
return source;
});
mainTemplate.plugin("hot-bootstrap", function(source, chunk, hash) {
const hotUpdateChunkFilename = this.outputOptions.hotUpdateChunkFilename;
const hotUpdateMainFilename = this.outputOptions.hotUpdateMainFilename;
const hotUpdateFunction = this.outputOptions.hotUpdateFunction;
const currentHotUpdateChunkFilename = this.applyPluginsWaterfall("asset-path", JSON.stringify(hotUpdateChunkFilename), {
hash: `" + ${this.renderCurrentHashCode(hash)} + "`,
hashWithLength: length => `" + ${this.renderCurrentHashCode(hash, length)} + "`,
chunk: {
id: "\" + chunkId + \""
}
});
const currentHotUpdateMainFilename = this.applyPluginsWaterfall("asset-path", JSON.stringify(hotUpdateMainFilename), {
hash: `" + ${this.renderCurrentHashCode(hash)} + "`,
hashWithLength: length => `" + ${this.renderCurrentHashCode(hash, length)} + "`
});
const runtimeSource = Template.getFunctionContent(require("./JsonpMainTemplate.runtime.js"))
.replace(/\/\/\$semicolon/g, ";")
.replace(/\$require\$/g, this.requireFn)
.replace(/\$hotMainFilename\$/g, currentHotUpdateMainFilename)
.replace(/\$hotChunkFilename\$/g, currentHotUpdateChunkFilename)
.replace(/\$hash\$/g, JSON.stringify(hash));
return `${source}
function hotDisposeChunk(chunkId) {
delete installedChunks[chunkId];
}
var parentHotUpdateCallback = global.parentHotUpdateCallback = this[${JSON.stringify(hotUpdateFunction)}];
this[${JSON.stringify(hotUpdateFunction)}] = ${runtimeSource}`;
});
mainTemplate.plugin("hash", function(hash) {
hash.update("jsonp");
hash.update("4");
hash.update(`${this.outputOptions.filename}`);
hash.update(`${this.outputOptions.chunkFilename}`);
hash.update(`${this.outputOptions.jsonpFunction}`);
hash.update(`${this.outputOptions.hotUpdateFunction}`);
});
}
}
module.exports = JsonpMainTemplatePlugin;