我目前有一个monorepo，其中有两个（+）包使用纱线工作区：
root
/packages
/common
/web
...
root/package.json
...
"workspaces": {
"packages": [
"packages/*"
],
"nohoist": [
"**"
],
},
web是带有打字稿模板的普通create-react-app。我想在common中使用某些TS代码，但似乎CRA不支持web以外的编译代码，当我尝试从src中的common导入时出现错误]：
web因此，我弹出../common/state/user/actions.ts 4:66
Module parse failed: Unexpected token (4:66)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
| import { UpdateUserParams } from './reducer';
|
> export const login = createAction('USER/LOGIN')<{ username: string; password: string }>();
后将其包含在this comment中，但我遵循了/common上的说明，但似乎babel-loader加载了文件，但现在没有从打字稿中编译它们：
./common/state/user/actions.ts
SyntaxError: /Users/brandon/Code/apps/packages/common/state/user/actions.ts: Unexpected token, expected "," (4:66)
2 | import { UpdateUserParams } from './reducer';
3 |
> 4 | export const login = createAction('USER/LOGIN')<{ username: string; password: string }>();
| ^
5 |
6 | export const logout = createAction('USER/LOGOUT')();
我如何使webpack / babel正确地共同编译代码？我知道我可以让common编译自己的代码，但我不想每次都要进行更改时都不必重新编译通用代码。让每个应用程序自己完成都是理想的选择。
Webpack.config.js：
....
module: {
strictExportPresence: true,
rules: [
// Disable require.ensure as it's not a standard language feature.
{ parser: { requireEnsure: false } },
// First, run the linter.
// It's important to do this before Babel processes the JS.
// {
// test: /\.(js|mjs|jsx|ts|tsx)$/,
// enforce: 'pre',
// use: [
// {
// options: {
// cache: true,
// formatter: require.resolve('react-dev-utils/eslintFormatter'),
// eslintPath: require.resolve('eslint'),
// resolvePluginsRelativeTo: __dirname,
// },
// loader: require.resolve('eslint-loader'),
// },
// ],
// include: paths.appSrc,
// },
{
// "oneOf" will traverse all following loaders until one will
// match the requirements. When no loader matches it will fall
// back to the "file" loader at the end of the loader list.
oneOf: [
// "url" loader works like "file" loader except that it embeds assets
// smaller than specified limit in bytes as data URLs to avoid requests.
// A missing `test` is equivalent to a match.
{
test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
loader: require.resolve('url-loader'),
options: {
limit: imageInlineSizeLimit,
name: 'static/media/[name].[hash:8].[ext]',
},
},
// Process application JS with Babel.
// The preset includes JSX, Flow, TypeScript, and some ESnext features.
{
test: /\.(js|mjs|jsx|ts|tsx)$/,
include: paths.appLernaModules.concat(paths.appSrc), // MAIN CHANGE HERE!!!
loader: require.resolve('babel-loader'),
options: {
customize: require.resolve('babel-preset-react-app/webpack-overrides'),
plugins: [
[
require.resolve('babel-plugin-named-asset-import'),
{
loaderMap: {
svg: {
ReactComponent: '@svgr/webpack?-svgo,+titleProp,+ref![path]',
},
},
},
],
],
// This is a feature of `babel-loader` for webpack (not Babel itself).
// It enables caching results in ./node_modules/.cache/babel-loader/
// directory for faster rebuilds.
cacheDirectory: true,
// See #6846 for context on why cacheCompression is disabled
cacheCompression: false,
compact: isEnvProduction,
},
},
// Process any JS outside of the app with Babel.
// Unlike the application JS, we only compile the standard ES features.
{
test: /\.(js|mjs)$/,
exclude: /@babel(?:\/|\\{1,2})runtime/,
loader: require.resolve('babel-loader'),
options: {
babelrc: false,
configFile: false,
compact: false,
presets: [
[require.resolve('babel-preset-react-app/dependencies'), { helpers: true }],
],
cacheDirectory: true,
// See #6846 for context on why cacheCompression is disabled
cacheCompression: false,
// Babel sourcemaps are needed for debugging into node_modules
// code. Without the options below, debuggers like VSCode
// show incorrect code and set breakpoints on the wrong lines.
sourceMaps: shouldUseSourceMap,
inputSourceMap: shouldUseSourceMap,
},
},
// "postcss" loader applies autoprefixer to our CSS.
// "css" loader resolves paths in CSS and adds assets as dependencies.
// "style" loader turns CSS into JS modules that inject <style> tags.
// In production, we use MiniCSSExtractPlugin to extract that CSS
// to a file, but in development "style" loader enables hot editing
// of CSS.
// By default we support CSS Modules with the extension .module.css
{
test: cssRegex,
exclude: cssModuleRegex,
use: getStyleLoaders({
importLoaders: 1,
sourceMap: isEnvProduction && shouldUseSourceMap,
}),
// Don't consider CSS imports dead code even if the
// containing package claims to have no side effects.
// Remove this when webpack adds a warning or an error for this.
// See https://github.com/webpack/webpack/issues/6571
sideEffects: true,
},
// Adds support for CSS Modules (https://github.com/css-modules/css-modules)
// using the extension .module.css
{
test: cssModuleRegex,
use: getStyleLoaders({
importLoaders: 1,
sourceMap: isEnvProduction && shouldUseSourceMap,
modules: {
getLocalIdent: getCSSModuleLocalIdent,
},
}),
},
// Opt-in support for SASS (using .scss or .sass extensions).
// By default we support SASS Modules with the
// extensions .module.scss or .module.sass
{
test: sassRegex,
exclude: sassModuleRegex,
use: getStyleLoaders(
{
importLoaders: 2,
sourceMap: isEnvProduction && shouldUseSourceMap,
},
'sass-loader',
),
// Don't consider CSS imports dead code even if the
// containing package claims to have no side effects.
// Remove this when webpack adds a warning or an error for this.
// See https://github.com/webpack/webpack/issues/6571
sideEffects: true,
},
// Adds support for CSS Modules, but using SASS
// using the extension .module.scss or .module.sass
{
test: sassModuleRegex,
use: getStyleLoaders(
{
importLoaders: 2,
sourceMap: isEnvProduction && shouldUseSourceMap,
modules: {
getLocalIdent: getCSSModuleLocalIdent,
},
},
'sass-loader',
),
},
// "file" loader makes sure those assets get served by WebpackDevServer.
// When you `import` an asset, you get its (virtual) filename.
// In production, they would get copied to the `build` folder.
// This loader doesn't use a "test" so it will catch all modules
// that fall through the other loaders.
{
loader: require.resolve('file-loader'),
// Exclude `js` files to keep "css" loader working as it injects
// its runtime that would otherwise be processed through "file" loader.
// Also exclude `html` and `json` extensions so they get processed
// by webpacks internal loaders.
exclude: [/\.(js|mjs|jsx|ts|tsx)$/, /\.html$/, /\.json$/],
options: {
name: 'static/media/[name].[hash:8].[ext]',
},
},
// ** STOP ** Are you adding a new loader?
// Make sure to add the new loader(s) before the "file" loader.
],
},
],
},
plugins: [
// Generates an `index.html` file with the <script> injected.
new HtmlWebpackPlugin(
Object.assign(
{},
{
inject: true,
template: paths.appHtml,
},
isEnvProduction
? {
minify: {
removeComments: true,
collapseWhitespace: true,
removeRedundantAttributes: true,
useShortDoctype: true,
removeEmptyAttributes: true,
removeStyleLinkTypeAttributes: true,
keepClosingSlash: true,
minifyJS: true,
minifyCSS: true,
minifyURLs: true,
},
}
: undefined,
),
),
...
paths.js
'use strict';
const path = require('path');
const fs = require('fs');
const url = require('url');
// Make sure any symlinks in the project folder are resolved:
// https://github.com/facebook/create-react-app/issues/637
const appDirectory = fs.realpathSync(process.cwd());
const resolveApp = relativePath => path.resolve(appDirectory, relativePath);
const envPublicUrl = process.env.PUBLIC_URL;
function ensureSlash(inputPath, needsSlash) {
const hasSlash = inputPath.endsWith('/');
if (hasSlash && !needsSlash) {
return inputPath.substr(0, inputPath.length - 1);
} else if (!hasSlash && needsSlash) {
return `${inputPath}/`;
} else {
return inputPath;
}
}
const getPublicUrl = appPackageJson => envPublicUrl || require(appPackageJson).homepage;
// We use `PUBLIC_URL` environment variable or "homepage" field to infer
// "public path" at which the app is served.
// Webpack needs to know it to put the right <script> hrefs into HTML even in
// single-page apps that may serve index.html for nested URLs like /todos/42.
// We can't use a relative path in HTML because we don't want to load something
// like /todos/42/static/js/bundle.7289d.js. We have to know the root.
function getServedPath(appPackageJson) {
const publicUrl = getPublicUrl(appPackageJson);
const servedUrl = envPublicUrl || (publicUrl ? url.parse(publicUrl).pathname : '/');
return ensureSlash(servedUrl, true);
}
const moduleFileExtensions = [
'web.mjs',
'mjs',
'web.js',
'js',
'web.ts',
'ts',
'web.tsx',
'tsx',
'json',
'web.jsx',
'jsx',
];
// Resolve file paths in the same order as webpack
const resolveModule = (resolveFn, filePath) => {
const extension = moduleFileExtensions.find(extension =>
fs.existsSync(resolveFn(`${filePath}.${extension}`)),
);
if (extension) {
return resolveFn(`${filePath}.${extension}`);
}
return resolveFn(`${filePath}.js`);
};
// config after eject: we're in ./config/
module.exports = {
dotenv: resolveApp('.env'),
appPath: resolveApp('.'),
appBuild: resolveApp('build'),
appPublic: resolveApp('public'),
appHtml: resolveApp('public/index.html'),
appIndexJs: resolveModule(resolveApp, 'src/index'),
appPackageJson: resolveApp('package.json'),
appSrc: resolveApp('src'),
appTsConfig: resolveApp('tsconfig.json'),
appJsConfig: resolveApp('jsconfig.json'),
yarnLockFile: resolveApp('yarn.lock'),
testsSetup: resolveModule(resolveApp, 'src/setupTests'),
proxySetup: resolveApp('src/setupProxy.js'),
appNodeModules: resolveApp('node_modules'),
publicUrl: getPublicUrl(resolveApp('package.json')),
servedPath: getServedPath(resolveApp('package.json')),
};
module.exports.moduleFileExtensions = moduleFileExtensions;
module.exports.lernaRoot = path.resolve(module.exports.appPath, '../../');
module.exports.appLernaModules = [];
module.exports.allLernaModules = fs.readdirSync(path.join(module.exports.lernaRoot, 'packages'));
fs.readdirSync(module.exports.appNodeModules).forEach(folderName => {
if (folderName === 'react-scripts') {
return;
}
const fullName = path.join(module.exports.appNodeModules, folderName);
if (fs.lstatSync(fullName).isSymbolicLink()) {
module.exports.appLernaModules.push(fs.realpathSync(fullName));
}
});
tsconfig：
// base in root
{
"compilerOptions": {
"allowJs": true,
"checkJs": false,
"esModuleInterop": true,
"downlevelIteration": true,
"lib": ["esnext", "dom"],
"noUnusedLocals": true,
"skipLibCheck": true,
"strict": true,
"target": "esnext",
"noEmit": true,
"moduleResolution": "node",
"resolveJsonModule": true
}
}
//packages/web/tsconfig.json
{
"extends": "../../tsconfig.json",
"compilerOptions": {
"jsx": "react",
"baseUrl": "src",
"allowSyntheticDefaultImports": true,
"forceConsistentCasingInFileNames": true,
"module": "esnext",
"isolatedModules": true,
"typeRoots": ["./node_modules/@types"],
},
"include": [
"src"
]
}
最终使它正常工作。为了使TS正常工作，除了链接的解决方案之外，您还需要向加载程序中明确添加预设：[['@babel/preset-typescript', { allExtensions: true, isTSX: true }]]：
// Process application JS with Babel.
// The preset includes JSX, Flow, TypeScript, and some ESnext features.
{
test: /\.(js|mjs|jsx|ts|tsx)$/,
include: [paths.appSrc, ...paths.appLernaModules],
loader: require.resolve('babel-loader'),
options: {
customize: require.resolve('babel-preset-react-app/webpack-overrides'),
presets: [['@babel/preset-typescript', { allExtensions: true, isTSX: true }]], // ADD THIS
plugins: [
[
require.resolve('babel-plugin-named-asset-import'),
{
loaderMap: {
svg: {
ReactComponent: '@svgr/webpack?-svgo,+titleProp,+ref![path]',
},
},
},
],
],
// This is a feature of `babel-loader` for webpack (not Babel itself).
// It enables caching results in ./node_modules/.cache/babel-loader/
// directory for faster rebuilds.
cacheDirectory: true,
// See #6846 for context on why cacheCompression is disabled
cacheCompression: false,
compact: isEnvProduction,
},
},