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CompatRuntimeModule.js
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Fri, Feb 14, 21:18

CompatRuntimeModule.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
*/
"use strict";
const RuntimeGlobals = require("../RuntimeGlobals");
const RuntimeModule = require("../RuntimeModule");
/** @typedef {import("../MainTemplate")} MainTemplate */
class CompatRuntimeModule extends RuntimeModule {
constructor() {
super("compat", RuntimeModule.STAGE_ATTACH);
this.fullHash = true;
}
/**
* @returns {string} runtime code
*/
generate() {
const { chunk, compilation } = this;
const {
chunkGraph,
runtimeTemplate,
mainTemplate,
moduleTemplates,
dependencyTemplates
} = compilation;
const bootstrap = mainTemplate.hooks.bootstrap.call(
"",
chunk,
compilation.hash || "XXXX",
moduleTemplates.javascript,
dependencyTemplates
);
const localVars = mainTemplate.hooks.localVars.call(
"",
chunk,
compilation.hash || "XXXX"
);
const requireExtensions = mainTemplate.hooks.requireExtensions.call(
"",
chunk,
compilation.hash || "XXXX"
);
const runtimeRequirements = chunkGraph.getTreeRuntimeRequirements(chunk);
let requireEnsure = "";
if (runtimeRequirements.has(RuntimeGlobals.ensureChunk)) {
const requireEnsureHandler = mainTemplate.hooks.requireEnsure.call(
"",
chunk,
compilation.hash || "XXXX",
"chunkId"
);
if (requireEnsureHandler) {
requireEnsure = `${
RuntimeGlobals.ensureChunkHandlers
}.compat = ${runtimeTemplate.basicFunction(
"chunkId, promises",
requireEnsureHandler
)};`;
}
}
return [bootstrap, localVars, requireEnsure, requireExtensions]
.filter(Boolean)
.join("\n");
}
/**
* @returns {boolean} true, if the runtime module should get it's own scope
*/
shouldIsolate() {
// We avoid isolating this to have better backward-compat
return false;
}
}
module.exports = CompatRuntimeModule;

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