js • Lines: 1601"use strict";
/** @typedef {import("./index.js").ExtractCommentsOptions} ExtractCommentsOptions */
/** @typedef {import("./index.js").ExtractCommentsFunction} ExtractCommentsFunction */
/** @typedef {import("./index.js").ExtractCommentsCondition} ExtractCommentsCondition */
/** @typedef {import("./index.js").Input} Input */
/** @typedef {import("./index.js").MinimizedResult} MinimizedResult */
/** @typedef {import("./index.js").CustomOptions} CustomOptions */
/** @typedef {import("./index.js").RawSourceMap} RawSourceMap */
/** @typedef {import("./index.js").EXPECTED_OBJECT} EXPECTED_OBJECT */
/**
* @typedef {string[]} ExtractedComments
*/
const JS_FILE_RE = /\.[cm]?js(\?.*)?$/i;
const JSON_FILE_RE = /\.json(\?.*)?$/i;
const HTML_FILE_RE = /\.html?(\?.*)?$/i;
const CSS_FILE_RE = /\.css(\?.*)?$/i;
/**
* Map a webpack `output.environment` configuration to the highest
* ECMAScript version that the target is known to support. Returns `5`
* when no ES2015+ features are flagged.
* @param {NonNullable<NonNullable<import("webpack").Configuration["output"]>["environment"]>} environment environment
* @returns {number} ecma version (5, 2015, 2017 or 2020)
*/
function getEcmaVersion(environment) {
// ES2020 (11th edition)
if (environment.bigIntLiteral || environment.dynamicImport || environment.dynamicImportInWorker || environment.globalThis || environment.optionalChaining) {
return 2020;
}
// ES2017 (8th edition)
if (environment.asyncFunction) {
return 2017;
}
// ES2015 (6th edition)
if (environment.arrowFunction || environment.const || environment.destructuring || environment.forOf || environment.methodShorthand || environment.module || environment.templateLiteral) {
return 2015;
}
return 5;
}
const notSettled = Symbol("not-settled");
/**
* @template T
* @typedef {() => Promise<T>} Task
*/
/**
* Run tasks with limited concurrency.
* @template T
* @param {number} limit Limit of tasks that run at once.
* @param {Task<T>[]} tasks List of tasks to run.
* @returns {Promise<T[]>} A promise that fulfills to an array of the results
*/
function throttleAll(limit, tasks) {
return new Promise((resolve, reject) => {
const result = Array.from({
length: tasks.length
}).fill(notSettled);
const entries = tasks.entries();
const next = () => {
const {
done,
value
} = entries.next();
if (done) {
const isLast = !result.includes(notSettled);
if (isLast) resolve(result);
return;
}
const [index, task] = value;
/**
* @param {T} resultValue Result value
*/
const onFulfilled = resultValue => {
result[index] = resultValue;
next();
};
task().then(onFulfilled, reject);
};
for (let i = 0; i < limit; i++) {
next();
}
});
}
/* istanbul ignore next */
/**
* @param {Input} input input
* @param {RawSourceMap=} sourceMap source map
* @param {CustomOptions=} minimizerOptions options
* @param {ExtractCommentsOptions=} extractComments extract comments option
* @returns {Promise<MinimizedResult>} minimized result
*/
async function terserMinify(input, sourceMap, minimizerOptions, extractComments) {
/**
* @param {unknown} value value
* @returns {value is EXPECTED_OBJECT} true when value is object or function
*/
const isObject = value => {
const type = typeof value;
// eslint-disable-next-line no-eq-null, eqeqeq
return value != null && (type === "object" || type === "function");
};
/**
* @param {import("terser").MinifyOptions & { sourceMap: import("terser").SourceMapOptions | undefined } & ({ output: import("terser").FormatOptions & { beautify: boolean } } | { format: import("terser").FormatOptions & { beautify: boolean } })} terserOptions terser options
* @param {ExtractedComments} extractedComments extracted comments
* @returns {ExtractCommentsFunction} function to extract comments
*/
const buildComments = (terserOptions, extractedComments) => {
/** @type {{ [index: string]: ExtractCommentsCondition }} */
const condition = {};
let comments;
if (terserOptions.format) {
({
comments
} = terserOptions.format);
} else if (terserOptions.output) {
({
comments
} = terserOptions.output);
}
condition.preserve = typeof comments !== "undefined" ? comments : false;
if (typeof extractComments === "boolean" && extractComments) {
condition.extract = "some";
} else if (typeof extractComments === "string" || extractComments instanceof RegExp) {
condition.extract = extractComments;
} else if (typeof extractComments === "function") {
condition.extract = extractComments;
} else if (extractComments && isObject(extractComments)) {
condition.extract = typeof extractComments.condition === "boolean" && extractComments.condition ? "some" : typeof extractComments.condition !== "undefined" ? extractComments.condition : "some";
} else {
// No extract
// Preserve using "commentsOpts" or "some"
condition.preserve = typeof comments !== "undefined" ? comments : "some";
condition.extract = false;
}
// Ensure that both conditions are functions
for (const key of ["preserve", "extract"]) {
/** @type {undefined | string} */
let regexStr;
/** @type {undefined | RegExp} */
let regex;
switch (typeof condition[key]) {
case "boolean":
condition[key] = condition[key] ? () => true : () => false;
break;
case "function":
break;
case "string":
if (condition[key] === "all") {
condition[key] = () => true;
break;
}
if (condition[key] === "some") {
condition[key] = /** @type {ExtractCommentsFunction} */
(astNode, comment) => (comment.type === "comment2" || comment.type === "comment1") && /@preserve|@lic|@cc_on|^\**!/i.test(comment.value);
break;
}
regexStr = /** @type {string} */condition[key];
condition[key] = /** @type {ExtractCommentsFunction} */
(astNode, comment) => new RegExp(/** @type {string} */regexStr).test(comment.value);
break;
default:
regex = /** @type {RegExp} */condition[key];
condition[key] = /** @type {ExtractCommentsFunction} */
(astNode, comment) => /** @type {RegExp} */regex.test(comment.value);
}
}
// Redefine the comments function to extract and preserve
// comments according to the two conditions
const seenComments = new Set(extractedComments);
return (astNode, comment) => {
if (/** @type {{ extract: ExtractCommentsFunction }} */
condition.extract(astNode, comment)) {
const commentText = comment.type === "comment2" ? `/*${comment.value}*/` : `//${comment.value}`;
// Don't include duplicate comments
if (!seenComments.has(commentText)) {
seenComments.add(commentText);
extractedComments.push(commentText);
}
}
return /** @type {{ preserve: ExtractCommentsFunction }} */condition.preserve(astNode, comment);
};
};
/**
* @param {import("terser").MinifyOptions=} terserOptions terser options
* @returns {import("terser").MinifyOptions & { sourceMap: import("terser").SourceMapOptions | undefined } & { compress: import("terser").CompressOptions } & ({ output: import("terser").FormatOptions & { beautify: boolean } } | { format: import("terser").FormatOptions & { beautify: boolean } })} built terser options
*/
const buildTerserOptions = (terserOptions = {}) => (
// Need deep copy objects to avoid https://github.com/terser/terser/issues/366
{
...terserOptions,
compress: typeof terserOptions.compress === "boolean" ? terserOptions.compress ? {} : false : {
...terserOptions.compress
},
// ecma: terserOptions.ecma,
// ie8: terserOptions.ie8,
// keep_classnames: terserOptions.keep_classnames,
// keep_fnames: terserOptions.keep_fnames,
mangle:
// eslint-disable-next-line no-eq-null, eqeqeq
terserOptions.mangle == null ? true : typeof terserOptions.mangle === "boolean" ? terserOptions.mangle : {
...terserOptions.mangle
},
// module: terserOptions.module,
// nameCache: { ...terserOptions.toplevel },
// the `output` option is deprecated
...(terserOptions.format ? {
format: {
beautify: false,
...terserOptions.format
}
} : {
output: {
beautify: false,
...terserOptions.output
}
}),
parse: {
...terserOptions.parse
},
// safari10: terserOptions.safari10,
// Ignoring sourceMap from options
sourceMap: undefined
// toplevel: terserOptions.toplevel
});
let minify;
try {
({
minify
} = require("terser"));
} catch (err) {
return {
errors: [(/** @type {Error} */err)]
};
}
// Copy `terser` options
const terserOptions = buildTerserOptions(minimizerOptions);
// Let terser generate a SourceMap. The dispatcher in `minify.js`
// chains the previous step's map onto this one.
if (sourceMap) {
terserOptions.sourceMap = {
asObject: true
};
}
/** @type {ExtractedComments} */
const extractedComments = [];
if (terserOptions.output) {
terserOptions.output.comments = buildComments(terserOptions, extractedComments);
} else if (terserOptions.format) {
terserOptions.format.comments = buildComments(terserOptions, extractedComments);
}
if (terserOptions.compress) {
// More optimizations
if (typeof terserOptions.compress.ecma === "undefined") {
terserOptions.compress.ecma = terserOptions.ecma;
}
// https://github.com/webpack/webpack/issues/16135
if (terserOptions.ecma === 5 && typeof terserOptions.compress.arrows === "undefined") {
terserOptions.compress.arrows = false;
}
}
const [[filename, code]] = Object.entries(input);
const result = await minify({
[filename]: code
}, terserOptions);
return {
code: (/** @type {string} * */result.code),
map: result.map ? (/** @type {RawSourceMap} * */result.map) : undefined,
extractedComments
};
}
/**
* @returns {string | undefined} the minimizer version
*/
terserMinify.getMinimizerVersion = () => {
let packageJson;
try {
packageJson = require("terser/package.json");
} catch (_err) {
// Ignore
}
return packageJson && packageJson.version;
};
/**
* @returns {boolean | undefined} true if worker thread is supported, false otherwise
*/
terserMinify.supportsWorkerThreads = () => true;
/**
* @param {string} name asset name
* @returns {boolean} true if `name` looks like a JavaScript file
*/
terserMinify.filter = name => JS_FILE_RE.test(name);
/* istanbul ignore next */
/**
* @param {Input} input input
* @param {RawSourceMap=} sourceMap source map
* @param {CustomOptions=} minimizerOptions options
* @param {ExtractCommentsOptions=} extractComments extract comments option
* @returns {Promise<MinimizedResult>} minimized result
*/
async function uglifyJsMinify(input, sourceMap, minimizerOptions, extractComments) {
/**
* @param {unknown} value value
* @returns {boolean} true when value is object or function
*/
const isObject = value => {
const type = typeof value;
// eslint-disable-next-line no-eq-null, eqeqeq
return value != null && (type === "object" || type === "function");
};
/**
* @param {import("uglify-js").MinifyOptions & { sourceMap: boolean | import("uglify-js").SourceMapOptions | undefined } & { output: import("uglify-js").OutputOptions & { beautify: boolean } }} uglifyJsOptions uglify-js options
* @param {ExtractedComments} extractedComments extracted comments
* @returns {ExtractCommentsFunction} extract comments function
*/
const buildComments = (uglifyJsOptions, extractedComments) => {
/** @type {{ [index: string]: ExtractCommentsCondition }} */
const condition = {};
const {
comments
} = uglifyJsOptions.output;
condition.preserve = typeof comments !== "undefined" ? comments : false;
if (typeof extractComments === "boolean" && extractComments) {
condition.extract = "some";
} else if (typeof extractComments === "string" || extractComments instanceof RegExp) {
condition.extract = extractComments;
} else if (typeof extractComments === "function") {
condition.extract = extractComments;
} else if (extractComments && isObject(extractComments)) {
condition.extract = typeof extractComments.condition === "boolean" && extractComments.condition ? "some" : typeof extractComments.condition !== "undefined" ? extractComments.condition : "some";
} else {
// No extract
// Preserve using "commentsOpts" or "some"
condition.preserve = typeof comments !== "undefined" ? comments : "some";
condition.extract = false;
}
// Ensure that both conditions are functions
for (const key of ["preserve", "extract"]) {
/** @type {undefined | string} */
let regexStr;
/** @type {undefined | RegExp} */
let regex;
switch (typeof condition[key]) {
case "boolean":
condition[key] = condition[key] ? () => true : () => false;
break;
case "function":
break;
case "string":
if (condition[key] === "all") {
condition[key] = () => true;
break;
}
if (condition[key] === "some") {
condition[key] = /** @type {ExtractCommentsFunction} */
(astNode, comment) => (comment.type === "comment2" || comment.type === "comment1") && /@preserve|@lic|@cc_on|^\**!/i.test(comment.value);
break;
}
regexStr = /** @type {string} */condition[key];
condition[key] = /** @type {ExtractCommentsFunction} */
(astNode, comment) => new RegExp(/** @type {string} */regexStr).test(comment.value);
break;
default:
regex = /** @type {RegExp} */condition[key];
condition[key] = /** @type {ExtractCommentsFunction} */
(astNode, comment) => /** @type {RegExp} */regex.test(comment.value);
}
}
// Redefine the comments function to extract and preserve
// comments according to the two conditions
const seenComments = new Set(extractedComments);
return (astNode, comment) => {
if (/** @type {{ extract: ExtractCommentsFunction }} */
condition.extract(astNode, comment)) {
const commentText = comment.type === "comment2" ? `/*${comment.value}*/` : `//${comment.value}`;
// Don't include duplicate comments
if (!seenComments.has(commentText)) {
seenComments.add(commentText);
extractedComments.push(commentText);
}
}
return /** @type {{ preserve: ExtractCommentsFunction }} */condition.preserve(astNode, comment);
};
};
/**
* @param {import("uglify-js").MinifyOptions & { ecma?: number | string }=} uglifyJsOptions uglify-js options
* @returns {import("uglify-js").MinifyOptions & { sourceMap: boolean | import("uglify-js").SourceMapOptions | undefined } & { output: import("uglify-js").OutputOptions & { beautify: boolean } }} uglify-js options
*/
const buildUglifyJsOptions = (uglifyJsOptions = {}) => {
if (typeof uglifyJsOptions.ecma !== "undefined") {
delete uglifyJsOptions.ecma;
}
if (typeof uglifyJsOptions.module !== "undefined") {
delete uglifyJsOptions.module;
}
// Need deep copy objects to avoid https://github.com/terser/terser/issues/366
return {
...uglifyJsOptions,
// warnings: uglifyJsOptions.warnings,
parse: {
...uglifyJsOptions.parse
},
compress: typeof uglifyJsOptions.compress === "boolean" ? uglifyJsOptions.compress : {
...uglifyJsOptions.compress
},
mangle:
// eslint-disable-next-line no-eq-null, eqeqeq
uglifyJsOptions.mangle == null ? true : typeof uglifyJsOptions.mangle === "boolean" ? uglifyJsOptions.mangle : {
...uglifyJsOptions.mangle
},
output: {
beautify: false,
...uglifyJsOptions.output
},
// Ignoring sourceMap from options
sourceMap: undefined
// toplevel: uglifyJsOptions.toplevel
// nameCache: { ...uglifyJsOptions.toplevel },
// ie8: uglifyJsOptions.ie8,
// keep_fnames: uglifyJsOptions.keep_fnames,
};
};
let minify;
try {
({
minify
} = require("uglify-js"));
} catch (err) {
return {
errors: [(/** @type {Error} */err)]
};
}
// Copy `uglify-js` options
const uglifyJsOptions = buildUglifyJsOptions(minimizerOptions);
// Let `uglify-js` generate a SourceMap. The dispatcher in `minify.js`
// chains the previous step's map onto this one.
if (sourceMap) {
uglifyJsOptions.sourceMap = true;
}
/** @type {ExtractedComments} */
const extractedComments = [];
// @ts-expect-error wrong types in uglify-js
uglifyJsOptions.output.comments = buildComments(uglifyJsOptions, extractedComments);
const [[filename, code]] = Object.entries(input);
const result = await minify({
[filename]: code
}, uglifyJsOptions);
return {
code: result.code,
map: result.map ? JSON.parse(result.map) : undefined,
errors: result.error ? [result.error] : [],
warnings: result.warnings || [],
extractedComments
};
}
/**
* @returns {string | undefined} the minimizer version
*/
uglifyJsMinify.getMinimizerVersion = () => {
let packageJson;
try {
packageJson = require("uglify-js/package.json");
} catch (_err) {
// Ignore
}
return packageJson && packageJson.version;
};
/**
* @returns {boolean | undefined} true if worker thread is supported, false otherwise
*/
uglifyJsMinify.supportsWorkerThreads = () => true;
/**
* @param {string} name asset name
* @returns {boolean} true if `name` looks like a JavaScript file
*/
uglifyJsMinify.filter = name => JS_FILE_RE.test(name);
/* istanbul ignore next */
/**
* @param {Input} input input
* @param {RawSourceMap=} sourceMap source map
* @param {CustomOptions=} minimizerOptions options
* @param {ExtractCommentsOptions=} extractComments extract comments option
* @returns {Promise<MinimizedResult>} minimized result
*/
async function swcMinify(input, sourceMap, minimizerOptions, extractComments) {
/**
* @param {unknown} value value
* @returns {boolean} true when value is object or function
*/
const isObject = value => {
const type = typeof value;
// eslint-disable-next-line no-eq-null, eqeqeq
return value != null && (type === "object" || type === "function");
};
/**
* @param {unknown} extractCommentsOptions extract comments option
* @returns {Error} error for unsupported extract comments option
*/
const createExtractCommentsError = extractCommentsOptions => new Error(`The 'extractComments' option for 'swcMinify' only supports booleans, "some", "all", string patterns, RegExp values without flags, or object conditions that resolve to those forms. Received: ${extractCommentsOptions instanceof RegExp ? extractCommentsOptions.toString() : typeof extractCommentsOptions}.`);
/**
* @param {unknown} extractCommentsOptions extract comments option
* @returns {{ extractComments: false | true | "some" | "all" | { regex: string }, useDefaultPreserveComments: boolean }} normalized swc extract comments options
*/
const normalizeExtractComments = extractCommentsOptions => {
if (typeof extractCommentsOptions === "boolean") {
return {
extractComments: extractCommentsOptions,
useDefaultPreserveComments: !extractCommentsOptions
};
}
if (typeof extractCommentsOptions === "string") {
return {
extractComments: extractCommentsOptions === "some" || extractCommentsOptions === "all" ? extractCommentsOptions : {
regex: extractCommentsOptions
},
useDefaultPreserveComments: false
};
}
if (extractCommentsOptions instanceof RegExp) {
if (extractCommentsOptions.flags) {
throw createExtractCommentsError(extractCommentsOptions);
}
return {
extractComments: {
regex: extractCommentsOptions.source
},
useDefaultPreserveComments: false
};
}
if (typeof extractCommentsOptions === "function") {
throw createExtractCommentsError(extractCommentsOptions);
}
if (extractCommentsOptions && isObject(extractCommentsOptions)) {
const {
condition = "some"
} = /** @type {{ condition?: unknown }} */
extractCommentsOptions;
if (typeof condition === "boolean") {
return {
extractComments: condition ? "some" : false,
useDefaultPreserveComments: false
};
}
if (typeof condition === "string") {
return {
extractComments: condition === "some" || condition === "all" ? condition : {
regex: condition
},
useDefaultPreserveComments: false
};
}
if (condition instanceof RegExp) {
if (condition.flags) {
throw createExtractCommentsError(condition);
}
return {
extractComments: {
regex: condition.source
},
useDefaultPreserveComments: false
};
}
throw createExtractCommentsError(condition);
}
return {
extractComments: false,
useDefaultPreserveComments: false
};
};
/**
* @param {import("@swc/core").JsMinifyOptions=} swcOptions swc options
* @returns {import("@swc/core").JsMinifyOptions & { extractComments?: false | true | "some" | "all" | { regex: string } } & { sourceMap: undefined | boolean } & { compress: import("@swc/core").TerserCompressOptions }} built swc options
*/
const buildSwcOptions = (swcOptions = {}) => (
// Need deep copy objects to avoid https://github.com/terser/terser/issues/366
{
...swcOptions,
compress: typeof swcOptions.compress === "boolean" ? swcOptions.compress ? {} : false : {
...swcOptions.compress
},
mangle:
// eslint-disable-next-line no-eq-null, eqeqeq
swcOptions.mangle == null ? true : typeof swcOptions.mangle === "boolean" ? swcOptions.mangle : {
...swcOptions.mangle
},
format: {
...swcOptions.format
},
// ecma: swcOptions.ecma,
// keep_classnames: swcOptions.keep_classnames,
// keep_fnames: swcOptions.keep_fnames,
// module: swcOptions.module,
// safari10: swcOptions.safari10,
// toplevel: swcOptions.toplevel
sourceMap: undefined
});
let swc;
try {
swc = require("@swc/core");
} catch (err) {
return {
errors: [(/** @type {Error} */err)]
};
}
// Copy `swc` options
const swcOptions = buildSwcOptions(minimizerOptions);
const normalizedExtractComments = normalizeExtractComments(extractComments);
if (!swcOptions.format) {
swcOptions.format = {};
}
// Let `swc` generate a SourceMap.
if (sourceMap) {
swcOptions.sourceMap = true;
}
if (normalizedExtractComments.useDefaultPreserveComments && typeof swcOptions.format.comments === "undefined") {
swcOptions.format.comments = "some";
}
if (normalizedExtractComments.extractComments !== false) {
/** @type {import("@swc/core").JsMinifyOptions & { extractComments?: false | true | "some" | "all" | { regex: string } }} */
swcOptions.extractComments = normalizedExtractComments.extractComments;
}
if (swcOptions.compress) {
// More optimizations
if (typeof swcOptions.compress.ecma === "undefined") {
swcOptions.compress.ecma = swcOptions.ecma;
}
// https://github.com/webpack/webpack/issues/16135
if (swcOptions.ecma === 5 && typeof swcOptions.compress.arrows === "undefined") {
swcOptions.compress.arrows = false;
}
}
const [[filename, code]] = Object.entries(input);
const result = /** @type {import("@swc/core").Output & { extractedComments?: string[] }} */
await swc.minify(code, swcOptions);
let map;
if (result.map) {
map = JSON.parse(result.map);
// TODO workaround for swc because `filename` is not preset as in `swc` signature as for `terser`
map.sources = [filename];
delete map.sourcesContent;
}
return {
code: result.code,
map,
extractedComments: result.extractedComments || []
};
}
/**
* @returns {string | undefined} the minimizer version
*/
swcMinify.getMinimizerVersion = () => {
let packageJson;
try {
packageJson = require("@swc/core/package.json");
} catch (_err) {
// Ignore
}
return packageJson && packageJson.version;
};
/**
* @returns {boolean | undefined} true if worker thread is supported, false otherwise
*/
swcMinify.supportsWorkerThreads = () => false;
/**
* @param {string} name asset name
* @returns {boolean} true if `name` looks like a JavaScript file
*/
swcMinify.filter = name => JS_FILE_RE.test(name);
/* istanbul ignore next */
/**
* @param {Input} input input
* @param {RawSourceMap=} sourceMap source map
* @param {CustomOptions=} minimizerOptions options
* @returns {Promise<MinimizedResult>} minimized result
*/
async function esbuildMinify(input, sourceMap, minimizerOptions) {
/**
* @param {import("esbuild").TransformOptions & { ecma?: string | number, module?: boolean }=} esbuildOptions esbuild options
* @returns {import("esbuild").TransformOptions} built esbuild options
*/
const buildEsbuildOptions = (esbuildOptions = {}) => {
delete esbuildOptions.ecma;
if (esbuildOptions.module) {
esbuildOptions.format = "esm";
}
delete esbuildOptions.module;
// Need deep copy objects to avoid https://github.com/terser/terser/issues/366
return {
minify: true,
legalComments: "inline",
...esbuildOptions,
sourcemap: false
};
};
let esbuild;
try {
esbuild = require("esbuild");
} catch (err) {
return {
errors: [(/** @type {Error} */err)]
};
}
// Copy `esbuild` options
const esbuildOptions = buildEsbuildOptions(minimizerOptions);
// Let `esbuild` generate a SourceMap
if (sourceMap) {
esbuildOptions.sourcemap = true;
esbuildOptions.sourcesContent = false;
}
const [[filename, code]] = Object.entries(input);
esbuildOptions.sourcefile = filename;
const result = await esbuild.transform(code, esbuildOptions);
return {
code: result.code,
map: result.map ? JSON.parse(result.map) : undefined,
warnings: result.warnings.length > 0 ? result.warnings.map(item => {
const plugin = item.pluginName ? `\nPlugin Name: ${item.pluginName}` : "";
const location = item.location ? `\n\n${item.location.file}:${item.location.line}:${item.location.column}:\n ${item.location.line} | ${item.location.lineText}\n\nSuggestion: ${item.location.suggestion}` : "";
const notes = item.notes.length > 0 ? `\n\nNotes:\n${item.notes.map(note => `${note.location ? `[${note.location.file}:${note.location.line}:${note.location.column}] ` : ""}${note.text}${note.location ? `\nSuggestion: ${note.location.suggestion}` : ""}${note.location ? `\nLine text:\n${note.location.lineText}\n` : ""}`).join("\n")}` : "";
return `${item.text} [${item.id}]${plugin}${location}${item.detail ? `\nDetails:\n${item.detail}` : ""}${notes}`;
}) : []
};
}
/**
* @returns {string | undefined} the minimizer version
*/
esbuildMinify.getMinimizerVersion = () => {
let packageJson;
try {
packageJson = require("esbuild/package.json");
} catch (_err) {
// Ignore
}
return packageJson && packageJson.version;
};
/**
* @returns {boolean | undefined} true if worker thread is supported, false otherwise
*/
esbuildMinify.supportsWorkerThreads = () => false;
/**
* @param {string} name asset name
* @returns {boolean} true if `name` looks like a JavaScript file
*/
esbuildMinify.filter = name => JS_FILE_RE.test(name);
/* istanbul ignore next */
/**
* @param {Input} input input
* @param {RawSourceMap=} sourceMap source map
* @param {CustomOptions=} minimizerOptions options
* @returns {Promise<MinimizedResult>} minimized result
*/
async function jsonMinify(input, sourceMap, minimizerOptions) {
const options = /** @type {{ replacer?: Parameters<typeof JSON.stringify>[1], space?: Parameters<typeof JSON.stringify>[2] }} */
minimizerOptions;
const [[, code]] = Object.entries(input);
const result = JSON.stringify(JSON.parse(code), options.replacer, options.space);
return {
code: result
};
}
jsonMinify.getMinimizerVersion = () => "1.0.0";
jsonMinify.supportsWorker = () => false;
jsonMinify.supportsWorkerThreads = () => false;
/**
* @param {string} name asset name
* @returns {boolean} true if `name` looks like a JSON file
*/
jsonMinify.filter = name => JSON_FILE_RE.test(name);
/* istanbul ignore next */
/**
* Minify HTML using `html-minifier-terser`.
* @param {Input} input input
* @param {RawSourceMap=} sourceMap source map (ignored for HTML)
* @param {CustomOptions=} minimizerOptions options
* @returns {Promise<MinimizedResult>} minimized result
*/
async function htmlMinifierTerser(input, sourceMap, minimizerOptions) {
let htmlMinifier;
try {
htmlMinifier = require("html-minifier-terser");
} catch (err) {
return {
errors: [(/** @type {Error} */err)]
};
}
const [[, code]] = Object.entries(input);
/** @type {import("html-minifier-terser").Options} */
const defaultMinimizerOptions = {
caseSensitive: true,
// `collapseBooleanAttributes` is not always safe, since this can break CSS attribute selectors and not safe for XHTML
collapseWhitespace: true,
conservativeCollapse: true,
keepClosingSlash: true,
// We need ability to use cssnano, or setup own function without extra dependencies
minifyCSS: true,
minifyJS: true,
// `minifyURLs` is unsafe, because we can't guarantee what the base URL is
// `removeAttributeQuotes` is not safe in some rare cases, also HTML spec recommends against doing this
removeComments: true,
// `removeEmptyAttributes` is not safe, can affect certain style or script behavior, look at https://github.com/webpack-contrib/html-loader/issues/323
// `removeRedundantAttributes` is not safe, can affect certain style or script behavior, look at https://github.com/webpack-contrib/html-loader/issues/323
removeScriptTypeAttributes: true,
removeStyleLinkTypeAttributes: true
// `useShortDoctype` is not safe for XHTML
};
const result = await htmlMinifier.minify(code, {
...defaultMinimizerOptions,
...(/** @type {import("html-minifier-terser").Options} */minimizerOptions)
});
return {
code: result
};
}
/**
* @returns {string | undefined} the minimizer version
*/
htmlMinifierTerser.getMinimizerVersion = () => {
let packageJson;
try {
packageJson = require("html-minifier-terser/package.json");
} catch (_err) {
// Ignore
}
return packageJson && packageJson.version;
};
/**
* @returns {boolean | undefined} true if worker threads are supported
*/
htmlMinifierTerser.supportsWorkerThreads = () => true;
/**
* @param {string} name asset name
* @returns {boolean} true if `name` looks like an HTML file
*/
htmlMinifierTerser.filter = name => HTML_FILE_RE.test(name);
/* istanbul ignore next */
/**
* Minify HTML using `@minify-html/node`.
* @param {Input} input input
* @param {RawSourceMap=} sourceMap source map (ignored for HTML)
* @param {CustomOptions=} minimizerOptions options
* @returns {Promise<MinimizedResult>} minimized result
*/
async function minifyHtmlNode(input, sourceMap, minimizerOptions) {
let minifyHtmlPkg;
try {
minifyHtmlPkg = require("@minify-html/node");
} catch (err) {
return {
errors: [(/** @type {Error} */err)]
};
}
const [[, code]] = Object.entries(input);
const options = /** @type {Parameters<import("@minify-html/node").minify>[1]} */{
...minimizerOptions
};
const result = await minifyHtmlPkg.minify(Buffer.from(code), options);
return {
code: result.toString()
};
}
/**
* @returns {string | undefined} the minimizer version
*/
minifyHtmlNode.getMinimizerVersion = () => {
let packageJson;
try {
packageJson = require("@minify-html/node/package.json");
} catch (_err) {
// Ignore
}
return packageJson && packageJson.version;
};
/**
* @returns {boolean | undefined} false because `@minify-html/node` is a native binding
*/
minifyHtmlNode.supportsWorkerThreads = () => false;
/**
* @param {string} name asset name
* @returns {boolean} true if `name` looks like an HTML file
*/
minifyHtmlNode.filter = name => HTML_FILE_RE.test(name);
/* istanbul ignore next */
/**
* Map an `@swc/html` diagnostic to a regular `Error`.
* @param {EXPECTED_OBJECT} diagnostic diagnostic from `@swc/html`
* @returns {Error} error preserving `span` and `level` from the diagnostic
*/
function swcHtmlDiagnosticToError(diagnostic) {
const typed = /** @type {{ message: string, span?: unknown, level?: unknown }} */
diagnostic;
/** @type {Error & { span?: unknown, level?: unknown }} */
const error = new Error(typed.message);
error.span = typed.span;
error.level = typed.level;
return error;
}
/* istanbul ignore next */
/**
* Minify a complete HTML document using `@swc/html`.
* @param {Input} input input
* @param {RawSourceMap=} sourceMap source map (ignored for HTML)
* @param {CustomOptions=} minimizerOptions options
* @returns {Promise<MinimizedResult>} minimized result
*/
async function swcMinifyHtml(input, sourceMap, minimizerOptions) {
let swcMinifier;
try {
swcMinifier = require("@swc/html");
} catch (err) {
return {
errors: [(/** @type {Error} */err)]
};
}
const [[, code]] = Object.entries(input);
const options = /** @type {import("@swc/html").Options} */{
...minimizerOptions
};
const result = await swcMinifier.minify(Buffer.from(code), options);
return {
code: result.code,
errors: result.errors ? result.errors.map(swcHtmlDiagnosticToError) : undefined
};
}
/**
* @returns {string | undefined} the minimizer version
*/
swcMinifyHtml.getMinimizerVersion = () => {
let packageJson;
try {
packageJson = require("@swc/html/package.json");
} catch (_err) {
// Ignore
}
return packageJson && packageJson.version;
};
/**
* @returns {boolean | undefined} false because `@swc/html` is a native binding
*/
swcMinifyHtml.supportsWorkerThreads = () => false;
/**
* @param {string} name asset name
* @returns {boolean} true if `name` looks like an HTML file
*/
swcMinifyHtml.filter = name => HTML_FILE_RE.test(name);
/* istanbul ignore next */
/**
* Minify an HTML fragment using `@swc/html`.
*
* Use this for partial HTML (e.g. inside `<template></template>` tags or
* HTML strings that are inserted into another document).
* @param {Input} input input
* @param {RawSourceMap=} sourceMap source map (ignored for HTML)
* @param {CustomOptions=} minimizerOptions options
* @returns {Promise<MinimizedResult>} minimized result
*/
async function swcMinifyHtmlFragment(input, sourceMap, minimizerOptions) {
let swcMinifier;
try {
swcMinifier = require("@swc/html");
} catch (err) {
return {
errors: [(/** @type {Error} */err)]
};
}
const [[, code]] = Object.entries(input);
const options = /** @type {import("@swc/html").FragmentOptions} */{
...minimizerOptions
};
const result = await swcMinifier.minifyFragment(Buffer.from(code), options);
return {
code: result.code,
errors: result.errors ? result.errors.map(swcHtmlDiagnosticToError) : undefined
};
}
/**
* @returns {string | undefined} the minimizer version
*/
swcMinifyHtmlFragment.getMinimizerVersion = () => {
let packageJson;
try {
packageJson = require("@swc/html/package.json");
} catch (_err) {
// Ignore
}
return packageJson && packageJson.version;
};
/**
* @returns {boolean | undefined} false because `@swc/html` is a native binding
*/
swcMinifyHtmlFragment.supportsWorkerThreads = () => false;
/**
* @param {string} name asset name
* @returns {boolean} true if `name` looks like an HTML file
*/
swcMinifyHtmlFragment.filter = name => HTML_FILE_RE.test(name);
/* istanbul ignore next */
/**
* Minify CSS using `cssnano` (via `postcss`).
* @param {Input} input input
* @param {RawSourceMap=} sourceMap source map
* @param {CustomOptions=} minimizerOptions options
* @returns {Promise<MinimizedResult>} minimized result
*/
async function cssnanoMinify(input, sourceMap, minimizerOptions = {
preset: "default"
}) {
/**
* @template T
* @param {string} mod module to load
* @returns {Promise<T>} loaded module
*/
const load = async mod => {
let exports;
try {
exports = require(mod);
return exports;
} catch (err) {
let importESM;
try {
// eslint-disable-next-line no-new-func
importESM = new Function("id", "return import(id);");
} catch (_err) {
importESM = null;
}
if (/** @type {Error & { code: string }} */
err.code === "ERR_REQUIRE_ESM" && importESM) {
exports = await importESM(mod);
return exports.default;
}
throw err;
}
};
let postcss;
let cssnano;
try {
postcss = require("postcss");
cssnano = require("cssnano");
} catch (err) {
return {
errors: [(/** @type {Error} */err)]
};
}
const [[name, code]] = Object.entries(input);
/** @type {import("postcss").ProcessOptions} */
const postcssOptions = {
from: name,
... /** @type {{ processorOptions?: import("postcss").ProcessOptions }} */minimizerOptions.processorOptions
};
if (typeof postcssOptions.parser === "string") {
try {
postcssOptions.parser = await load(postcssOptions.parser);
} catch (error) {
throw new Error(`Loading PostCSS "${postcssOptions.parser}" parser failed: ${ /** @type {Error} */error.message}\n\n(@${name})`, {
cause: error
});
}
}
if (typeof postcssOptions.stringifier === "string") {
try {
postcssOptions.stringifier = await load(postcssOptions.stringifier);
} catch (error) {
throw new Error(`Loading PostCSS "${postcssOptions.stringifier}" stringifier failed: ${ /** @type {Error} */error.message}\n\n(@${name})`, {
cause: error
});
}
}
if (typeof postcssOptions.syntax === "string") {
try {
postcssOptions.syntax = await load(postcssOptions.syntax);
} catch (error) {
throw new Error(`Loading PostCSS "${postcssOptions.syntax}" syntax failed: ${ /** @type {Error} */error.message}\n\n(@${name})`, {
cause: error
});
}
}
if (sourceMap) {
postcssOptions.map = {
annotation: false
};
}
const result = await postcss.default([cssnano(minimizerOptions)]).process(code, postcssOptions);
return {
code: result.css,
map: result.map ? (/** @type {RawSourceMap} */
/** @type {unknown} */result.map.toJSON()) : undefined,
warnings: result.warnings().map(String)
};
}
/**
* @returns {string | undefined} the minimizer version
*/
cssnanoMinify.getMinimizerVersion = () => {
let packageJson;
try {
packageJson = require("cssnano/package.json");
} catch (_err) {
// Ignore
}
return packageJson && packageJson.version;
};
/**
* @returns {boolean | undefined} true if worker threads are supported
*/
cssnanoMinify.supportsWorkerThreads = () => true;
/**
* @param {string} name asset name
* @returns {boolean} true if `name` looks like a CSS file
*/
cssnanoMinify.filter = name => CSS_FILE_RE.test(name);
/* istanbul ignore next */
/**
* Minify CSS using `csso`.
* @param {Input} input input
* @param {RawSourceMap=} sourceMap source map
* @param {CustomOptions=} minimizerOptions options
* @returns {Promise<MinimizedResult>} minimized result
*/
async function cssoMinify(input, sourceMap, minimizerOptions) {
let csso;
try {
csso = require("csso");
} catch (err) {
return {
errors: [(/** @type {Error} */err)]
};
}
const [[filename, code]] = Object.entries(input);
const result = csso.minify(code, {
filename,
sourceMap: Boolean(sourceMap),
...minimizerOptions
});
return {
code: result.css,
map: result.map ? (/** @type {RawSourceMap} */
/** @type {{ toJSON(): RawSourceMap }} */result.map.toJSON()) : undefined
};
}
/**
* @returns {string | undefined} the minimizer version
*/
cssoMinify.getMinimizerVersion = () => {
let packageJson;
try {
packageJson = require("csso/package.json");
} catch (_err) {
// Ignore
}
return packageJson && packageJson.version;
};
/**
* @returns {boolean | undefined} true if worker threads are supported
*/
cssoMinify.supportsWorkerThreads = () => true;
/**
* @param {string} name asset name
* @returns {boolean} true if `name` looks like a CSS file
*/
cssoMinify.filter = name => CSS_FILE_RE.test(name);
/* istanbul ignore next */
/**
* Minify CSS using `clean-css`.
* @param {Input} input input
* @param {RawSourceMap=} sourceMap source map
* @param {CustomOptions=} minimizerOptions options
* @returns {Promise<MinimizedResult>} minimized result
*/
async function cleanCssMinify(input, sourceMap, minimizerOptions) {
let CleanCSS;
try {
CleanCSS = require("clean-css");
} catch (err) {
return {
errors: [(/** @type {Error} */err)]
};
}
const [[name, code]] = Object.entries(input);
const result = await new CleanCSS({
sourceMap: Boolean(sourceMap),
...minimizerOptions,
returnPromise: true
}).minify({
[name]: {
styles: code
}
});
const generatedSourceMap = result.sourceMap ? (/** @type {RawSourceMap} */
/** @type {{ toJSON(): RawSourceMap }} */(/** @type {unknown} */result.sourceMap).toJSON()) : undefined;
// workaround for source maps on windows
if (generatedSourceMap) {
const isWindowsPathSep = require("path").sep === "\\";
generatedSourceMap.sources = generatedSourceMap.sources.map(
/**
* @param {string | null} item path item
* @returns {string} normalized path
*/
item => isWindowsPathSep ? (item || "").replace(/\\/g, "/") : item || "");
}
return {
code: result.styles,
map: generatedSourceMap,
warnings: result.warnings
};
}
/**
* @returns {string | undefined} the minimizer version
*/
cleanCssMinify.getMinimizerVersion = () => {
let packageJson;
try {
packageJson = require("clean-css/package.json");
} catch (_err) {
// Ignore
}
return packageJson && packageJson.version;
};
/**
* @returns {boolean | undefined} true if worker threads are supported
*/
cleanCssMinify.supportsWorkerThreads = () => true;
/**
* @param {string} name asset name
* @returns {boolean} true if `name` looks like a CSS file
*/
cleanCssMinify.filter = name => CSS_FILE_RE.test(name);
/* istanbul ignore next */
/**
* Minify CSS using `esbuild` (with the CSS loader).
* @param {Input} input input
* @param {RawSourceMap=} sourceMap source map
* @param {CustomOptions=} minimizerOptions options
* @returns {Promise<MinimizedResult>} minimized result
*/
async function esbuildMinifyCss(input, sourceMap, minimizerOptions) {
/**
* @param {import("esbuild").TransformOptions & { ecma?: string | number, module?: boolean }=} esbuildOptions esbuild options
* @returns {import("esbuild").TransformOptions} built esbuild options
*/
const buildEsbuildOptions = (esbuildOptions = {}) => {
// `module` and `ecma` are JavaScript-only concepts; the dispatcher
// injects them for every minimizer, but esbuild's CSS transform
// rejects unknown options.
delete esbuildOptions.ecma;
delete esbuildOptions.module;
// Need deep copy objects to avoid https://github.com/terser/terser/issues/366
return {
loader: "css",
minify: true,
legalComments: "inline",
...esbuildOptions,
sourcemap: false
};
};
let esbuild;
try {
esbuild = require("esbuild");
} catch (err) {
return {
errors: [(/** @type {Error} */err)]
};
}
// Copy `esbuild` options
const esbuildOptions = buildEsbuildOptions(minimizerOptions);
// Let `esbuild` generate a SourceMap
if (sourceMap) {
esbuildOptions.sourcemap = true;
esbuildOptions.sourcesContent = false;
}
const [[filename, code]] = Object.entries(input);
esbuildOptions.sourcefile = filename;
const result = await esbuild.transform(code, esbuildOptions);
return {
code: result.code,
map: result.map ? JSON.parse(result.map) : undefined,
warnings: result.warnings.length > 0 ? result.warnings.map(item => {
const plugin = item.pluginName ? `\nPlugin Name: ${item.pluginName}` : "";
const location = item.location ? `\n\n${item.location.file}:${item.location.line}:${item.location.column}:\n ${item.location.line} | ${item.location.lineText}\n\nSuggestion: ${item.location.suggestion}` : "";
const notes = item.notes.length > 0 ? `\n\nNotes:\n${item.notes.map(note => `${note.location ? `[${note.location.file}:${note.location.line}:${note.location.column}] ` : ""}${note.text}${note.location ? `\nSuggestion: ${note.location.suggestion}` : ""}${note.location ? `\nLine text:\n${note.location.lineText}\n` : ""}`).join("\n")}` : "";
return `${item.text} [${item.id}]${plugin}${location}${item.detail ? `\nDetails:\n${item.detail}` : ""}${notes}`;
}) : []
};
}
/**
* @returns {string | undefined} the minimizer version
*/
esbuildMinifyCss.getMinimizerVersion = () => {
let packageJson;
try {
packageJson = require("esbuild/package.json");
} catch (_err) {
// Ignore
}
return packageJson && packageJson.version;
};
/**
* @returns {boolean | undefined} false because `esbuild` is a native binding
*/
esbuildMinifyCss.supportsWorkerThreads = () => false;
/**
* @param {string} name asset name
* @returns {boolean} true if `name` looks like a CSS file
*/
esbuildMinifyCss.filter = name => CSS_FILE_RE.test(name);
/* istanbul ignore next */
/**
* Minify CSS using `lightningcss`.
* @param {Input} input input
* @param {RawSourceMap=} sourceMap source map
* @param {CustomOptions=} minimizerOptions options
* @returns {Promise<MinimizedResult>} minimized result
*/
async function lightningCssMinify(input, sourceMap, minimizerOptions) {
let lightningCss;
try {
lightningCss = require("lightningcss");
} catch (err) {
return {
errors: [(/** @type {Error} */err)]
};
}
const [[filename, code]] = Object.entries(input);
/**
* @param {Partial<import("lightningcss").TransformOptions<import("lightningcss").CustomAtRules>>=} lightningCssOptions lightning css options
* @returns {import("lightningcss").TransformOptions<import("lightningcss").CustomAtRules>} built lightning css options
*/
const buildLightningCssOptions = (lightningCssOptions = {}) => (
// Need deep copy objects to avoid https://github.com/terser/terser/issues/366
{
minify: true,
...lightningCssOptions,
sourceMap: false,
filename,
code: new Uint8Array(Buffer.from(code))
});
// Copy `lightningCss` options
const lightningCssOptions = buildLightningCssOptions(minimizerOptions);
// Let `lightningcss` generate a SourceMap. The dispatcher in
// `minify.js` chains the previous step's map onto this one.
if (sourceMap) {
lightningCssOptions.sourceMap = true;
}
const result = lightningCss.transform(lightningCssOptions);
return {
code: result.code.toString(),
map: result.map ? JSON.parse(result.map.toString()) : undefined
};
}
/**
* @returns {string | undefined} the minimizer version
*/
lightningCssMinify.getMinimizerVersion = () => {
let packageJson;
try {
packageJson = require("lightningcss/package.json");
} catch (_err) {
// Ignore
}
return packageJson && packageJson.version;
};
/**
* @returns {boolean | undefined} false because `lightningcss` is a native binding
*/
lightningCssMinify.supportsWorkerThreads = () => false;
/**
* @param {string} name asset name
* @returns {boolean} true if `name` looks like a CSS file
*/
lightningCssMinify.filter = name => CSS_FILE_RE.test(name);
/* istanbul ignore next */
/**
* Map a `@swc/css` diagnostic to a regular `Error`.
* @param {EXPECTED_OBJECT} diagnostic diagnostic from `@swc/css`
* @returns {Error} error preserving `span` and `level` from the diagnostic
*/
function swcCssDiagnosticToError(diagnostic) {
const typed = /** @type {{ message: string, span?: unknown, level?: unknown }} */
diagnostic;
/** @type {Error & { span?: unknown, level?: unknown }} */
const error = new Error(typed.message);
error.span = typed.span;
error.level = typed.level;
return error;
}
/* istanbul ignore next */
/**
* Minify CSS using `@swc/css`.
* @param {Input} input input
* @param {RawSourceMap=} sourceMap source map
* @param {CustomOptions=} minimizerOptions options
* @returns {Promise<MinimizedResult>} minimized result
*/
async function swcMinifyCss(input, sourceMap, minimizerOptions) {
let swc;
try {
swc = require("@swc/css");
} catch (err) {
return {
errors: [(/** @type {Error} */err)]
};
}
const [[filename, code]] = Object.entries(input);
/**
* @param {Partial<import("@swc/css").MinifyOptions>=} swcOptions swc options
* @returns {import("@swc/css").MinifyOptions} built swc options
*/
const buildSwcOptions = (swcOptions = {}) => (
// Need deep copy objects to avoid https://github.com/terser/terser/issues/366
{
...swcOptions,
filename
});
// Copy `swc` options
const swcOptions = buildSwcOptions(minimizerOptions);
// Let `swc` generate a SourceMap
if (sourceMap) {
swcOptions.sourceMap = true;
}
const result = await swc.minify(Buffer.from(code), swcOptions);
return {
code: result.code.toString(),
map: result.map ? JSON.parse(result.map.toString()) : undefined,
errors: result.errors ? result.errors.map(swcCssDiagnosticToError) : undefined
};
}
/**
* @returns {string | undefined} the minimizer version
*/
swcMinifyCss.getMinimizerVersion = () => {
let packageJson;
try {
packageJson = require("@swc/css/package.json");
} catch (_err) {
// Ignore
}
return packageJson && packageJson.version;
};
/**
* @returns {boolean | undefined} false because `@swc/css` is a native binding
*/
swcMinifyCss.supportsWorkerThreads = () => false;
/**
* @param {string} name asset name
* @returns {boolean} true if `name` looks like a CSS file
*/
swcMinifyCss.filter = name => CSS_FILE_RE.test(name);
/**
* @template T
* @typedef {() => T} FunctionReturning
*/
/**
* @template T
* @param {FunctionReturning<T>} fn memorized function
* @returns {FunctionReturning<T>} new function
*/
function memoize(fn) {
let cache = false;
/** @type {T} */
let result;
return () => {
if (cache) {
return result;
}
result = fn();
cache = true;
// Allow to clean up memory for fn
// and all dependent resources
/** @type {FunctionReturning<T> | undefined} */
fn = undefined;
return /** @type {T} */result;
};
}
module.exports = {
cleanCssMinify,
cssnanoMinify,
cssoMinify,
esbuildMinify,
esbuildMinifyCss,
getEcmaVersion,
htmlMinifierTerser,
jsonMinify,
lightningCssMinify,
memoize,
minifyHtmlNode,
swcMinify,
swcMinifyCss,
swcMinifyHtml,
swcMinifyHtmlFragment,
terserMinify,
throttleAll,
uglifyJsMinify
};