webpack/lib/config/defaults.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

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

"use strict";

const path = require("path");
const Template = require("../Template");
const { cleverMerge } = require("../util/cleverMerge");
const {
	getTargetsProperties,
	getTargetProperties,
	getDefaultTarget
} = require("./target");

/** @typedef {import("../../declarations/WebpackOptions").CacheOptionsNormalized} CacheOptions */
/** @typedef {import("../../declarations/WebpackOptions").EntryNormalized} Entry */
/** @typedef {import("../../declarations/WebpackOptions").Experiments} Experiments */
/** @typedef {import("../../declarations/WebpackOptions").ExternalsPresets} ExternalsPresets */
/** @typedef {import("../../declarations/WebpackOptions").ExternalsType} ExternalsType */
/** @typedef {import("../../declarations/WebpackOptions").InfrastructureLogging} InfrastructureLogging */
/** @typedef {import("../../declarations/WebpackOptions").Library} Library */
/** @typedef {import("../../declarations/WebpackOptions").LibraryName} LibraryName */
/** @typedef {import("../../declarations/WebpackOptions").LibraryOptions} LibraryOptions */
/** @typedef {import("../../declarations/WebpackOptions").Loader} Loader */
/** @typedef {import("../../declarations/WebpackOptions").Mode} Mode */
/** @typedef {import("../../declarations/WebpackOptions").ModuleOptions} ModuleOptions */
/** @typedef {import("../../declarations/WebpackOptions").Node} WebpackNode */
/** @typedef {import("../../declarations/WebpackOptions").Optimization} Optimization */
/** @typedef {import("../../declarations/WebpackOptions").OutputNormalized} Output */
/** @typedef {import("../../declarations/WebpackOptions").Performance} Performance */
/** @typedef {import("../../declarations/WebpackOptions").ResolveOptions} ResolveOptions */
/** @typedef {import("../../declarations/WebpackOptions").RuleSetRules} RuleSetRules */
/** @typedef {import("../../declarations/WebpackOptions").SnapshotOptions} SnapshotOptions */
/** @typedef {import("../../declarations/WebpackOptions").Target} Target */
/** @typedef {import("../../declarations/WebpackOptions").WebpackOptionsNormalized} WebpackOptions */
/** @typedef {import("./target").TargetProperties} TargetProperties */

const NODE_MODULES_REGEXP = /[\\/]node_modules[\\/]/i;

/**
 * Sets a constant default value when undefined
 * @template T
 * @template {keyof T} P
 * @param {T} obj an object
 * @param {P} prop a property of this object
 * @param {T[P]} value a default value of the property
 * @returns {void}
 */
const D = (obj, prop, value) => {
	if (obj[prop] === undefined) {
		obj[prop] = value;
	}
};

/**
 * Sets a dynamic default value when undefined, by calling the factory function
 * @template T
 * @template {keyof T} P
 * @param {T} obj an object
 * @param {P} prop a property of this object
 * @param {function(): T[P]} factory a default value factory for the property
 * @returns {void}
 */
const F = (obj, prop, factory) => {
	if (obj[prop] === undefined) {
		obj[prop] = factory();
	}
};

/**
 * Sets a dynamic default value when undefined, by calling the factory function.
 * factory must return an array or undefined
 * When the current value is already an array an contains "..." it's replaced with
 * the result of the factory function
 * @template T
 * @template {keyof T} P
 * @param {T} obj an object
 * @param {P} prop a property of this object
 * @param {function(): T[P]} factory a default value factory for the property
 * @returns {void}
 */
const A = (obj, prop, factory) => {
	const value = obj[prop];
	if (value === undefined) {
		obj[prop] = factory();
	} else if (Array.isArray(value)) {
		/** @type {any[]} */
		let newArray = undefined;
		for (let i = 0; i < value.length; i++) {
			const item = value[i];
			if (item === "...") {
				if (newArray === undefined) {
					newArray = i > 0 ? value.slice(0, i - 1) : [];
					obj[prop] = /** @type {T[P]} */ (/** @type {unknown} */ (newArray));
				}
				const items = /** @type {any[]} */ (/** @type {unknown} */ (factory()));
				if (items !== undefined) {
					for (const item of items) {
						newArray.push(item);
					}
				}
			} else if (newArray !== undefined) {
				newArray.push(item);
			}
		}
	}
};

/**
 * @param {WebpackOptions} options options to be modified
 * @returns {void}
 */
const applyWebpackOptionsBaseDefaults = options => {
	F(options, "context", () => process.cwd());
};

/**
 * @param {WebpackOptions} options options to be modified
 * @returns {void}
 */
const applyWebpackOptionsDefaults = options => {
	F(options, "context", () => process.cwd());
	F(options, "target", () => {
		return getDefaultTarget(options.context);
	});

	const { mode, name, target } = options;

	let targetProperties =
		target === false
			? /** @type {false} */ (false)
			: typeof target === "string"
			? getTargetProperties(target, options.context)
			: getTargetsProperties(target, options.context);

	const development = mode === "development";
	const production = mode === "production" || !mode;

	if (typeof options.entry !== "function") {
		for (const key of Object.keys(options.entry)) {
			F(
				options.entry[key],
				"import",
				() => /** @type {[string]} */ (["./src"])
			);
		}
	}

	F(options, "devtool", () => (development ? "eval" : false));
	D(options, "watch", false);
	D(options, "profile", false);
	D(options, "parallelism", 100);
	D(options, "recordsInputPath", false);
	D(options, "recordsOutputPath", false);

	F(options, "cache", () =>
		development ? { type: /** @type {"memory"} */ ("memory") } : false
	);
	applyCacheDefaults(options.cache, {
		name: name || "default",
		mode: mode || "production"
	});
	const cache = !!options.cache;

	applySnapshotDefaults(options.snapshot, { production });

	applyExperimentsDefaults(options.experiments);

	applyModuleDefaults(options.module, {
		cache,
		syncWebAssembly: options.experiments.syncWebAssembly,
		asyncWebAssembly: options.experiments.asyncWebAssembly
	});

	applyOutputDefaults(options.output, {
		context: options.context,
		targetProperties,
		outputModule: options.experiments.outputModule,
		development,
		entry: options.entry
	});

	applyExternalsPresetsDefaults(options.externalsPresets, { targetProperties });

	applyLoaderDefaults(options.loader, { targetProperties });

	F(options, "externalsType", () => {
		const validExternalTypes = require("../../schemas/WebpackOptions.json")
			.definitions.ExternalsType.enum;
		return options.output.library &&
			validExternalTypes.includes(options.output.library.type)
			? /** @type {ExternalsType} */ (options.output.library.type)
			: options.output.module
			? "module"
			: "var";
	});

	applyNodeDefaults(options.node, { targetProperties });

	F(options, "performance", () =>
		production &&
		targetProperties &&
		(targetProperties.browser || targetProperties.browser === null)
			? {}
			: false
	);
	applyPerformanceDefaults(options.performance, {
		production
	});

	applyOptimizationDefaults(options.optimization, {
		development,
		production,
		records: !!(options.recordsInputPath || options.recordsOutputPath)
	});

	options.resolve = cleverMerge(
		getResolveDefaults({
			cache,
			context: options.context,
			targetProperties,
			mode: options.mode
		}),
		options.resolve
	);

	options.resolveLoader = cleverMerge(
		getResolveLoaderDefaults({ cache }),
		options.resolveLoader
	);

	applyInfrastructureLoggingDefaults(options.infrastructureLogging);
};

/**
 * @param {Experiments} experiments options
 * @returns {void}
 */
const applyExperimentsDefaults = experiments => {
	D(experiments, "topLevelAwait", false);
	D(experiments, "syncWebAssembly", false);
	D(experiments, "asyncWebAssembly", false);
	D(experiments, "outputModule", false);
};

/**
 * @param {CacheOptions} cache options
 * @param {Object} options options
 * @param {string} options.name name
 * @param {string} options.mode mode
 * @returns {void}
 */
const applyCacheDefaults = (cache, { name, mode }) => {
	if (cache === false) return;
	switch (cache.type) {
		case "filesystem":
			F(cache, "name", () => name + "-" + mode);
			D(cache, "version", "");
			F(cache, "cacheDirectory", () => {
				const pkgDir = require("pkg-dir");
				const cwd = process.cwd();
				const dir = pkgDir.sync(cwd);
				if (!dir) {
					return path.resolve(cwd, ".cache/webpack");
				} else if (process.versions.pnp === "1") {
					return path.resolve(dir, ".pnp/.cache/webpack");
				} else if (process.versions.pnp === "3") {
					return path.resolve(dir, ".yarn/.cache/webpack");
				} else {
					return path.resolve(dir, "node_modules/.cache/webpack");
				}
			});
			F(cache, "cacheLocation", () =>
				path.resolve(cache.cacheDirectory, cache.name)
			);
			D(cache, "hashAlgorithm", "md4");
			D(cache, "store", "pack");
			D(cache, "idleTimeout", 60000);
			D(cache, "idleTimeoutForInitialStore", 0);
			D(cache.buildDependencies, "defaultWebpack", [
				path.resolve(__dirname, "..") + path.sep
			]);
			break;
	}
};

/**
 * @param {SnapshotOptions} snapshot options
 * @param {Object} options options
 * @param {boolean} options.production is production
 * @returns {void}
 */
const applySnapshotDefaults = (snapshot, { production }) => {
	A(snapshot, "managedPaths", () => {
		if (process.versions.pnp === "3") {
			const match = /^(.+?)[\\/]cache[\\/]watchpack-npm-[^\\/]+\.zip[\\/]node_modules[\\/]/.exec(
				require.resolve("watchpack")
			);
			if (match) {
				return [path.resolve(match[1], "unplugged")];
			}
		} else {
			const match = /^(.+?[\\/]node_modules)[\\/]/.exec(
				// eslint-disable-next-line node/no-extraneous-require
				require.resolve("watchpack")
			);
			if (match) {
				return [match[1]];
			}
		}
		return [];
	});
	A(snapshot, "immutablePaths", () => {
		if (process.versions.pnp === "1") {
			const match = /^(.+?[\\/]v4)[\\/]npm-watchpack-[^\\/]+-[\da-f]{40}[\\/]node_modules[\\/]/.exec(
				require.resolve("watchpack")
			);
			if (match) {
				return [match[1]];
			}
		} else if (process.versions.pnp === "3") {
			const match = /^(.+?)[\\/]watchpack-npm-[^\\/]+\.zip[\\/]node_modules[\\/]/.exec(
				require.resolve("watchpack")
			);
			if (match) {
				return [match[1]];
			}
		}
		return [];
	});
	F(snapshot, "resolveBuildDependencies", () => ({
		timestamp: true,
		hash: true
	}));
	F(snapshot, "buildDependencies", () => ({ timestamp: true, hash: true }));
	F(snapshot, "module", () =>
		production ? { timestamp: true, hash: true } : { timestamp: true }
	);
	F(snapshot, "resolve", () =>
		production ? { timestamp: true, hash: true } : { timestamp: true }
	);
};

/**
 * @param {ModuleOptions} module options
 * @param {Object} options options
 * @param {boolean} options.cache is caching enabled
 * @param {boolean} options.syncWebAssembly is syncWebAssembly enabled
 * @param {boolean} options.asyncWebAssembly is asyncWebAssembly enabled
 * @returns {void}
 */
const applyModuleDefaults = (
	module,
	{ cache, syncWebAssembly, asyncWebAssembly }
) => {
	D(module, "unknownContextRequest", ".");
	D(module, "unknownContextRegExp", false);
	D(module, "unknownContextRecursive", true);
	D(module, "unknownContextCritical", true);
	D(module, "exprContextRequest", ".");
	D(module, "exprContextRegExp", false);
	D(module, "exprContextRecursive", true);
	D(module, "exprContextCritical", true);
	D(module, "wrappedContextRegExp", /.*/);
	D(module, "wrappedContextRecursive", true);
	D(module, "wrappedContextCritical", false);

	D(module, "strictExportPresence", false);
	D(module, "strictThisContextOnImports", false);

	if (cache) {
		D(module, "unsafeCache", module => {
			const name = module.nameForCondition();
			return name && NODE_MODULES_REGEXP.test(name);
		});
	} else {
		D(module, "unsafeCache", false);
	}

	A(module, "defaultRules", () => {
		const esm = {
			type: "javascript/esm",
			resolve: {
				byDependency: {
					esm: {
						fullySpecified: true
					}
				}
			}
		};
		const commonjs = {
			type: "javascript/dynamic"
		};
		/** @type {RuleSetRules} */
		const rules = [
			{
				type: "javascript/auto"
			},
			{
				mimetype: "application/node",
				type: "javascript/auto"
			},
			{
				test: /\.json$/i,
				type: "json"
			},
			{
				mimetype: "application/json",
				type: "json"
			},
			{
				test: /\.mjs$/i,
				...esm
			},
			{
				test: /\.js$/i,
				descriptionData: {
					type: "module"
				},
				...esm
			},
			{
				test: /\.cjs$/i,
				...commonjs
			},
			{
				test: /\.js$/i,
				descriptionData: {
					type: "commonjs"
				},
				...commonjs
			},
			{
				mimetype: {
					or: ["text/javascript", "application/javascript"]
				},
				...esm
			},
			{
				dependency: "url",
				type: "asset/resource"
			}
		];
		if (asyncWebAssembly) {
			const wasm = {
				type: "webassembly/async",
				rules: [
					{
						descriptionData: {
							type: "module"
						},
						resolve: {
							fullySpecified: true
						}
					}
				]
			};
			rules.push({
				test: /\.wasm$/i,
				...wasm
			});
			rules.push({
				mimetype: "application/wasm",
				...wasm
			});
		} else if (syncWebAssembly) {
			const wasm = {
				type: "webassembly/sync",
				rules: [
					{
						descriptionData: {
							type: "module"
						},
						resolve: {
							fullySpecified: true
						}
					}
				]
			};
			rules.push({
				test: /\.wasm$/i,
				...wasm
			});
			rules.push({
				mimetype: "application/wasm",
				...wasm
			});
		}
		return rules;
	});
};

/**
 * @param {Output} output options
 * @param {Object} options options
 * @param {string} options.context context
 * @param {TargetProperties | false} options.targetProperties target properties
 * @param {boolean} options.outputModule is outputModule experiment enabled
 * @param {boolean} options.development is development mode
 * @param {Entry} options.entry entry option
 * @returns {void}
 */
const applyOutputDefaults = (
	output,
	{ context, targetProperties: tp, outputModule, development, entry }
) => {
	/**
	 * @param {Library=} library the library option
	 * @returns {string} a readable library name
	 */
	const getLibraryName = library => {
		const libraryName =
			typeof library === "object" &&
			library &&
			!Array.isArray(library) &&
			"type" in library
				? library.name
				: /** @type {LibraryName=} */ (library);
		if (Array.isArray(libraryName)) {
			return libraryName.join(".");
		} else if (typeof libraryName === "object") {
			return getLibraryName(libraryName.root);
		} else if (typeof libraryName === "string") {
			return libraryName;
		}
		return "";
	};

	F(output, "uniqueName", () => {
		const libraryName = getLibraryName(output.library);
		if (libraryName) return libraryName;
		try {
			const packageInfo = require(`${context}/package.json`);
			return packageInfo.name || "";
		} catch (e) {
			return "";
		}
	});

	D(output, "filename", "[name].js");
	F(output, "module", () => !!outputModule);
	F(output, "iife", () => !output.module);
	D(output, "importFunctionName", "import");
	D(output, "importMetaName", "import.meta");
	F(output, "chunkFilename", () => {
		const filename = output.filename;
		if (typeof filename !== "function") {
			const hasName = filename.includes("[name]");
			const hasId = filename.includes("[id]");
			const hasChunkHash = filename.includes("[chunkhash]");
			const hasContentHash = filename.includes("[contenthash]");
			// Anything changing depending on chunk is fine
			if (hasChunkHash || hasContentHash || hasName || hasId) return filename;
			// Otherwise prefix "[id]." in front of the basename to make it changing
			return filename.replace(/(^|\/)([^/]*(?:\?|$))/, "$1[id].$2");
		}
		return "[id].js";
	});
	D(output, "assetModuleFilename", "[hash][ext][query]");
	D(output, "webassemblyModuleFilename", "[hash].module.wasm");
	D(output, "compareBeforeEmit", true);
	D(output, "charset", true);
	F(output, "hotUpdateGlobal", () =>
		Template.toIdentifier(
			"webpackHotUpdate" + Template.toIdentifier(output.uniqueName)
		)
	);
	F(output, "chunkLoadingGlobal", () =>
		Template.toIdentifier(
			"webpackChunk" + Template.toIdentifier(output.uniqueName)
		)
	);
	F(output, "globalObject", () => {
		if (tp) {
			if (tp.global) return "global";
			if (tp.globalThis) return "globalThis";
		}
		return "self";
	});
	F(output, "chunkFormat", () => {
		if (tp) {
			if (tp.document) return "array-push";
			if (tp.require) return "commonjs";
			if (tp.nodeBuiltins) return "commonjs";
			if (tp.importScripts) return "array-push";
			if (tp.dynamicImport && output.module) return "module";
		}
		return false;
	});
	F(output, "chunkLoading", () => {
		if (tp) {
			if (tp.document) return "jsonp";
			if (tp.require) return "require";
			if (tp.nodeBuiltins) return "async-node";
			if (tp.importScripts) return "import-scripts";
			if (tp.dynamicImport && output.module) return "import";
			if (
				tp.require === null ||
				tp.nodeBuiltins === null ||
				tp.document === null ||
				tp.importScripts === null
			) {
				return "universal";
			}
		}
		return false;
	});
	F(output, "workerChunkLoading", () => {
		if (tp) {
			if (tp.require) return "require";
			if (tp.nodeBuiltins) return "async-node";
			if (tp.importScriptsInWorker) return "import-scripts";
			if (tp.dynamicImportInWorker && output.module) return "import";
			if (
				tp.require === null ||
				tp.nodeBuiltins === null ||
				tp.importScriptsInWorker === null
			) {
				return "universal";
			}
		}
		return false;
	});
	F(output, "wasmLoading", () => {
		if (tp) {
			if (tp.nodeBuiltins) return "async-node";
			if (tp.fetchWasm) return "fetch";
			if (tp.nodeBuiltins === null || tp.fetchWasm === null) {
				return "universal";
			}
		}
		return false;
	});
	F(output, "workerWasmLoading", () => output.wasmLoading);
	F(output, "devtoolNamespace", () => output.uniqueName);
	if (output.library) {
		F(output.library, "type", () => (output.module ? "module" : "var"));
	}
	F(output, "path", () => path.join(process.cwd(), "dist"));
	F(output, "pathinfo", () => development);
	D(output, "sourceMapFilename", "[file].map[query]");
	D(output, "hotUpdateChunkFilename", "[id].[fullhash].hot-update.js");
	D(output, "hotUpdateMainFilename", "[fullhash].hot-update.json");
	D(output, "crossOriginLoading", false);
	F(output, "scriptType", () => (output.module ? "module" : false));
	D(
		output,
		"publicPath",
		(tp && (tp.document || tp.importScripts)) || output.scriptType === "module"
			? "auto"
			: ""
	);
	D(output, "chunkLoadTimeout", 120000);
	D(output, "hashFunction", "md4");
	D(output, "hashDigest", "hex");
	D(output, "hashDigestLength", 20);
	D(output, "strictModuleExceptionHandling", false);

	const optimistic = v => v || v === undefined;
	F(
		output.environment,
		"arrowFunction",
		() => tp && optimistic(tp.arrowFunction)
	);
	F(output.environment, "const", () => tp && optimistic(tp.const));
	F(
		output.environment,
		"destructuring",
		() => tp && optimistic(tp.destructuring)
	);
	F(output.environment, "forOf", () => tp && optimistic(tp.forOf));
	F(output.environment, "bigIntLiteral", () => tp && tp.bigIntLiteral);
	F(output.environment, "dynamicImport", () => tp && tp.dynamicImport);
	F(output.environment, "module", () => tp && tp.module);

	A(output, "enabledLibraryTypes", () => {
		const enabledLibraryTypes = [];
		if (output.library) {
			enabledLibraryTypes.push(output.library.type);
		}
		for (const name of Object.keys(entry)) {
			const desc = entry[name];
			if (desc.library) {
				enabledLibraryTypes.push(desc.library.type);
			}
		}
		return enabledLibraryTypes;
	});

	A(output, "enabledChunkLoadingTypes", () => {
		const enabledChunkLoadingTypes = new Set();
		if (output.chunkLoading) {
			enabledChunkLoadingTypes.add(output.chunkLoading);
		}
		if (output.workerChunkLoading) {
			enabledChunkLoadingTypes.add(output.workerChunkLoading);
		}
		for (const name of Object.keys(entry)) {
			const desc = entry[name];
			if (desc.chunkLoading) {
				enabledChunkLoadingTypes.add(desc.chunkLoading);
			}
		}
		return Array.from(enabledChunkLoadingTypes);
	});

	A(output, "enabledWasmLoadingTypes", () => {
		const enabledWasmLoadingTypes = new Set();
		if (output.wasmLoading) {
			enabledWasmLoadingTypes.add(output.wasmLoading);
		}
		if (output.workerWasmLoading) {
			enabledWasmLoadingTypes.add(output.workerWasmLoading);
		}
		for (const name of Object.keys(entry)) {
			const desc = entry[name];
			if (desc.wasmLoading) {
				enabledWasmLoadingTypes.add(desc.wasmLoading);
			}
		}
		return Array.from(enabledWasmLoadingTypes);
	});
};

/**
 * @param {ExternalsPresets} externalsPresets options
 * @param {Object} options options
 * @param {TargetProperties | false} options.targetProperties target properties
 * @returns {void}
 */
const applyExternalsPresetsDefaults = (
	externalsPresets,
	{ targetProperties }
) => {
	D(externalsPresets, "web", targetProperties && targetProperties.web);
	D(externalsPresets, "node", targetProperties && targetProperties.node);
	D(externalsPresets, "nwjs", targetProperties && targetProperties.nwjs);
	D(
		externalsPresets,
		"electron",
		targetProperties && targetProperties.electron
	);
	D(
		externalsPresets,
		"electronMain",
		targetProperties &&
			targetProperties.electron &&
			targetProperties.electronMain
	);
	D(
		externalsPresets,
		"electronPreload",
		targetProperties &&
			targetProperties.electron &&
			targetProperties.electronPreload
	);
	D(
		externalsPresets,
		"electronRenderer",
		targetProperties &&
			targetProperties.electron &&
			targetProperties.electronRenderer
	);
};

/**
 * @param {Loader} loader options
 * @param {Object} options options
 * @param {TargetProperties | false} options.targetProperties target properties
 * @returns {void}
 */
const applyLoaderDefaults = (loader, { targetProperties }) => {
	F(loader, "target", () => {
		if (targetProperties) {
			if (targetProperties.electron) {
				if (targetProperties.electronMain) return "electron-main";
				if (targetProperties.electronPreload) return "electron-preload";
				if (targetProperties.electronRenderer) return "electron-renderer";
				return "electron";
			}
			if (targetProperties.nwjs) return "nwjs";
			if (targetProperties.node) return "node";
			if (targetProperties.web) return "web";
		}
	});
};

/**
 * @param {WebpackNode} node options
 * @param {Object} options options
 * @param {TargetProperties | false} options.targetProperties target properties
 * @returns {void}
 */
const applyNodeDefaults = (node, { targetProperties }) => {
	if (node === false) return;
	F(node, "global", () => {
		if (targetProperties && targetProperties.global) return false;
		return true;
	});
	F(node, "__filename", () => {
		if (targetProperties && targetProperties.node) return "eval-only";
		return "mock";
	});
	F(node, "__dirname", () => {
		if (targetProperties && targetProperties.node) return "eval-only";
		return "mock";
	});
};

/**
 * @param {Performance} performance options
 * @param {Object} options options
 * @param {boolean} options.production is production
 * @returns {void}
 */
const applyPerformanceDefaults = (performance, { production }) => {
	if (performance === false) return;
	D(performance, "maxAssetSize", 250000);
	D(performance, "maxEntrypointSize", 250000);
	F(performance, "hints", () => (production ? "warning" : false));
};

/**
 * @param {Optimization} optimization options
 * @param {Object} options options
 * @param {boolean} options.production is production
 * @param {boolean} options.development is development
 * @param {boolean} options.records using records
 * @returns {void}
 */
const applyOptimizationDefaults = (
	optimization,
	{ production, development, records }
) => {
	D(optimization, "removeAvailableModules", false);
	D(optimization, "removeEmptyChunks", true);
	D(optimization, "mergeDuplicateChunks", true);
	D(optimization, "flagIncludedChunks", production);
	F(optimization, "moduleIds", () => {
		if (production) return "deterministic";
		if (development) return "named";
		return "natural";
	});
	F(optimization, "chunkIds", () => {
		if (production) return "deterministic";
		if (development) return "named";
		return "natural";
	});
	D(optimization, "sideEffects", true);
	D(optimization, "providedExports", true);
	D(optimization, "usedExports", production);
	D(optimization, "innerGraph", production);
	D(optimization, "mangleExports", production);
	D(optimization, "concatenateModules", production);
	D(optimization, "runtimeChunk", false);
	D(optimization, "emitOnErrors", !production);
	D(optimization, "checkWasmTypes", production);
	D(optimization, "mangleWasmImports", false);
	D(optimization, "portableRecords", records);
	D(optimization, "realContentHash", production);
	D(optimization, "minimize", production);
	A(optimization, "minimizer", () => [
		{
			apply: compiler => {
				// Lazy load the Terser plugin
				const TerserPlugin = require("terser-webpack-plugin");
				new TerserPlugin({
					terserOptions: {
						compress: {
							passes: 2
						}
					}
				}).apply(compiler);
			}
		}
	]);
	F(optimization, "nodeEnv", () => {
		if (production) return "production";
		if (development) return "development";
		return false;
	});
	const { splitChunks } = optimization;
	if (splitChunks) {
		A(splitChunks, "defaultSizeTypes", () => ["javascript", "unknown"]);
		D(splitChunks, "hidePathInfo", production);
		D(splitChunks, "chunks", "async");
		D(splitChunks, "usedExports", true);
		D(splitChunks, "minChunks", 1);
		F(splitChunks, "minSize", () => (production ? 20000 : 10000));
		F(splitChunks, "minRemainingSize", () => (development ? 0 : undefined));
		F(splitChunks, "enforceSizeThreshold", () => (production ? 50000 : 30000));
		F(splitChunks, "maxAsyncRequests", () => (production ? 30 : Infinity));
		F(splitChunks, "maxInitialRequests", () => (production ? 30 : Infinity));
		D(splitChunks, "automaticNameDelimiter", "-");
		const { cacheGroups } = splitChunks;
		F(cacheGroups, "default", () => ({
			idHint: "",
			reuseExistingChunk: true,
			minChunks: 2,
			priority: -20
		}));
		F(cacheGroups, "defaultVendors", () => ({
			idHint: "vendors",
			reuseExistingChunk: true,
			test: NODE_MODULES_REGEXP,
			priority: -10
		}));
	}
};

/**
 * @param {Object} options options
 * @param {boolean} options.cache is cache enable
 * @param {string} options.context build context
 * @param {TargetProperties | false} options.targetProperties target properties
 * @param {Mode} options.mode mode
 * @returns {ResolveOptions} resolve options
 */
const getResolveDefaults = ({ cache, context, targetProperties, mode }) => {
	/** @type {string[]} */
	const conditions = ["webpack"];

	conditions.push(mode === "development" ? "development" : "production");

	if (targetProperties) {
		if (targetProperties.webworker) conditions.push("worker");
		if (targetProperties.node) conditions.push("node");
		if (targetProperties.web) conditions.push("browser");
		if (targetProperties.electron) conditions.push("electron");
		if (targetProperties.nwjs) conditions.push("nwjs");
	}

	const jsExtensions = [".js", ".json", ".wasm"];

	const tp = targetProperties;
	const browserField =
		tp && tp.web && (!tp.node || (tp.electron && tp.electronRenderer));

	/** @type {function(): ResolveOptions} */
	const cjsDeps = () => ({
		aliasFields: browserField ? ["browser"] : [],
		mainFields: browserField ? ["browser", "module", "..."] : ["module", "..."],
		conditionNames: ["require", "module", "..."],
		extensions: [...jsExtensions]
	});
	/** @type {function(): ResolveOptions} */
	const esmDeps = () => ({
		aliasFields: browserField ? ["browser"] : [],
		mainFields: browserField ? ["browser", "module", "..."] : ["module", "..."],
		conditionNames: ["import", "module", "..."],
		extensions: [...jsExtensions]
	});

	/** @type {ResolveOptions} */
	const resolveOptions = {
		cache,
		modules: ["node_modules"],
		conditionNames: conditions,
		mainFiles: ["index"],
		extensions: [],
		aliasFields: [],
		exportsFields: ["exports"],
		roots: [context],
		mainFields: ["main"],
		byDependency: {
			wasm: esmDeps(),
			esm: esmDeps(),
			url: {
				preferRelative: true
			},
			worker: {
				...esmDeps(),
				preferRelative: true
			},
			commonjs: cjsDeps(),
			amd: cjsDeps(),
			// for backward-compat: loadModule
			loader: cjsDeps(),
			// for backward-compat: Custom Dependency
			unknown: cjsDeps(),
			// for backward-compat: getResolve without dependencyType
			undefined: cjsDeps()
		}
	};

	return resolveOptions;
};

/**
 * @param {Object} options options
 * @param {boolean} options.cache is cache enable
 * @returns {ResolveOptions} resolve options
 */
const getResolveLoaderDefaults = ({ cache }) => {
	/** @type {ResolveOptions} */
	const resolveOptions = {
		cache,
		conditionNames: ["loader", "require", "node"],
		exportsFields: ["exports"],
		mainFields: ["loader", "main"],
		extensions: [".js"],
		mainFiles: ["index"]
	};

	return resolveOptions;
};

/**
 * @param {InfrastructureLogging} infrastructureLogging options
 * @returns {void}
 */
const applyInfrastructureLoggingDefaults = infrastructureLogging => {
	D(infrastructureLogging, "level", "info");
	D(infrastructureLogging, "debug", false);
};

exports.applyWebpackOptionsBaseDefaults = applyWebpackOptionsBaseDefaults;
exports.applyWebpackOptionsDefaults = applyWebpackOptionsDefaults;