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70 lines
1.9 KiB
70 lines
1.9 KiB
3 years ago
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/*
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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 InitFragment = require("../InitFragment");
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const RuntimeGlobals = require("../RuntimeGlobals");
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const Template = require("../Template");
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/** @typedef {import("webpack-sources").Source} Source */
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/** @typedef {import("../Generator").GenerateContext} GenerateContext */
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/**
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* @typedef {GenerateContext} Context
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*/
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class AwaitDependenciesInitFragment extends InitFragment {
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/**
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* @param {Set<string>} promises the promises that should be awaited
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*/
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constructor(promises) {
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super(
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undefined,
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InitFragment.STAGE_ASYNC_DEPENDENCIES,
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0,
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"await-dependencies"
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);
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this.promises = promises;
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}
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merge(other) {
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const promises = new Set(other.promises);
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for (const p of this.promises) {
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promises.add(p);
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}
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return new AwaitDependenciesInitFragment(promises);
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}
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/**
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* @param {Context} context context
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* @returns {string|Source} the source code that will be included as initialization code
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*/
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getContent({ runtimeRequirements }) {
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runtimeRequirements.add(RuntimeGlobals.module);
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const promises = this.promises;
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if (promises.size === 0) {
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return "";
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}
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if (promises.size === 1) {
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for (const p of promises) {
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return Template.asString([
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`var __webpack_async_dependencies__ = __webpack_handle_async_dependencies__([${p}]);`,
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`${p} = (__webpack_async_dependencies__.then ? (await __webpack_async_dependencies__)() : __webpack_async_dependencies__)[0];`,
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""
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]);
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}
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}
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const sepPromises = Array.from(promises).join(", ");
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// TODO check if destructuring is supported
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return Template.asString([
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`var __webpack_async_dependencies__ = __webpack_handle_async_dependencies__([${sepPromises}]);`,
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`([${sepPromises}] = __webpack_async_dependencies__.then ? (await __webpack_async_dependencies__)() : __webpack_async_dependencies__);`,
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""
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]);
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}
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}
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module.exports = AwaitDependenciesInitFragment;
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