source: frontend/node_modules/webpack/lib/dependencies/HarmonyCompatibilityDependency.js

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Tobias Koppers @sokra
*/

"use strict";

const { UsageState } = require("../ExportsInfo");
const InitFragment = require("../InitFragment");
const RuntimeGlobals = require("../RuntimeGlobals");
const makeSerializable = require("../util/makeSerializable");
const NullDependency = require("./NullDependency");

/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("../Dependency")} Dependency */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../Module").BuildMeta} BuildMeta */

class HarmonyCompatibilityDependency extends NullDependency {
        get type() {
                return "harmony export header";
        }
}

makeSerializable(
        HarmonyCompatibilityDependency,
        "webpack/lib/dependencies/HarmonyCompatibilityDependency"
);

HarmonyCompatibilityDependency.Template = class HarmonyExportDependencyTemplate extends (
        NullDependency.Template
) {
        /**
         * Applies the plugin by registering its hooks on the compiler.
         * @param {Dependency} dependency the dependency for which the template should be applied
         * @param {ReplaceSource} source the current replace source which can be modified
         * @param {DependencyTemplateContext} templateContext the context object
         * @returns {void}
         */
        apply(
                dependency,
                source,
                {
                        module,
                        runtimeTemplate,
                        moduleGraph,
                        initFragments,
                        runtimeRequirements,
                        runtime,
                        concatenationScope
                }
        ) {
                if (concatenationScope) return;
                const exportsInfo = moduleGraph.getExportsInfo(module);
                if (
                        exportsInfo.getReadOnlyExportInfo("__esModule").getUsed(runtime) !==
                        UsageState.Unused
                ) {
                        const content = runtimeTemplate.defineEsModuleFlagStatement({
                                exportsArgument: module.exportsArgument,
                                runtimeRequirements
                        });
                        initFragments.push(
                                new InitFragment(
                                        content,
                                        InitFragment.STAGE_HARMONY_EXPORTS,
                                        0,
                                        "harmony compatibility"
                                )
                        );
                }
                if (moduleGraph.isAsync(module)) {
                        runtimeRequirements.add(RuntimeGlobals.module);
                        runtimeRequirements.add(RuntimeGlobals.asyncModule);
                        initFragments.push(
                                new InitFragment(
                                        runtimeTemplate.supportsArrowFunction()
                                                ? `${RuntimeGlobals.asyncModule}(${module.moduleArgument}, async (__webpack_handle_async_dependencies__, __webpack_async_result__) => { try {\n`
                                                : `${RuntimeGlobals.asyncModule}(${module.moduleArgument}, async function (__webpack_handle_async_dependencies__, __webpack_async_result__) { try {\n`,
                                        InitFragment.STAGE_ASYNC_BOUNDARY,
                                        0,
                                        undefined,
                                        `\n__webpack_async_result__();\n} catch(e) { __webpack_async_result__(e); } }${
                                                /** @type {BuildMeta} */ (module.buildMeta).async ? ", 1" : ""
                                        });`
                                )
                        );
                }
        }
};

module.exports = HarmonyCompatibilityDependency;