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rOACCT/node_modules/webpack/lib/wasm-async/AsyncWasmLoadingRuntimeModule.js
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AsyncWasmLoadingRuntimeModule.js
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			/*
			MIT License http://www.opensource.org/licenses/mit-license.php
			Author Tobias Koppers @sokra
			*/

			"use strict";

			const RuntimeGlobals = require("../RuntimeGlobals");
			const RuntimeModule = require("../RuntimeModule");
			const Template = require("../Template");

			class AsyncWasmLoadingRuntimeModule extends RuntimeModule {
			constructor({ generateLoadBinaryCode, supportsStreaming }) {
			super("wasm loading", RuntimeModule.STAGE_NORMAL);
			this.generateLoadBinaryCode = generateLoadBinaryCode;
			this.supportsStreaming = supportsStreaming;
			}

			/**
			* @returns {string} runtime code
			*/
			generate() {
			const { compilation, chunk } = this;
			const { outputOptions, runtimeTemplate } = compilation;
			const fn = RuntimeGlobals.instantiateWasm;
			const wasmModuleSrcPath = compilation.getPath(
			JSON.stringify(outputOptions.webassemblyModuleFilename),
			{
			hash: `" + ${RuntimeGlobals.getFullHash}() + "`,
			hashWithLength: length =>
			`" + ${RuntimeGlobals.getFullHash}}().slice(0, ${length}) + "`,
			module: {
			id: '" + wasmModuleId + "',
			hash: `" + wasmModuleHash + "`,
			hashWithLength(length) {
			return `" + wasmModuleHash.slice(0, ${length}) + "`;
			}
			},
			runtime: chunk.runtime
			}
			);
			return `${fn} = ${runtimeTemplate.basicFunction(
			"exports, wasmModuleId, wasmModuleHash, importsObj",
			[
			`var req = ${this.generateLoadBinaryCode(wasmModuleSrcPath)};`,
			this.supportsStreaming
			? Template.asString([
			"if (typeof WebAssembly.instantiateStreaming === 'function') {",
			Template.indent([
			"return WebAssembly.instantiateStreaming(req, importsObj)",
			Template.indent([
			`.then(${runtimeTemplate.returningFunction(
			"Object.assign(exports, res.instance.exports)",
			"res"
			)});`
			])
			]),
			"}"
			])
			: "// no support for streaming compilation",
			"return req",
			Template.indent([
			`.then(${runtimeTemplate.returningFunction("x.arrayBuffer()", "x")})`,
			`.then(${runtimeTemplate.returningFunction(
			"WebAssembly.instantiate(bytes, importsObj)",
			"bytes"
			)})`,
			`.then(${runtimeTemplate.returningFunction(
			"Object.assign(exports, res.instance.exports)",
			"res"
			)});`
			])
			]
			)};`;
			}
			}

			module.exports = AsyncWasmLoadingRuntimeModule;