reactjs - Kan inte lösa Typescript-modul i en annan fil
Jag migrerar min React-app till TypeScript. Den fungerar bra nu, men efter att ha lagt till TypeScript-kompilatorn och bytt namn på filer till .ts och .tsx får jag felet 'module not found'. Någon ledning skulle vara till hjälp. Jag har följande mappstruktur.
| src
| select.tsx
| index.ts
| WindowedSelect.tsx
| MenuList.tsx
| demo
| index.tsx
| webpack.config.demo.js
| webpack.config.js
| tsconfig.json
| package.json
Jag kör demo/index (webpack.config.demo) för npm start-kommandot och src/index.tsx (webpack.config) för npm run build. Men får felmeddelandet Module Not Found i båda.
Fel (npm start):
ERROR in ./demo/index.tsx
Module not found: Error: Can't resolve '../src/WindowedSelect'
Fel (npm run build):
ERROR in ./src/index.ts
Module not found: Error: Can't resolve './MenuList'
ERROR in ./src/index.ts
Module not found: Error: Can't resolve './WindowedSelect'
IntelliSense fungerar bra och navigerar till motsvarande filer vid klick. Jag förstår inte vad problemet är här.
PS: förutom modulen som inte hittades-felet finns det också flera typfel eftersom detta är ett js-projekt. Planen är att gradvis migrera till typescript. Så hur ställer man in standardallvarlighetsgraden till "warn" för typfel?
webpack.config.js
const path = require('path');
module.exports = {
entry: './src/index.ts',
output: {
filename: 'main.js',
path: path.resolve(__dirname, 'dist'),
libraryTarget: 'commonjs2',
},
module: {
rules: [
{
test: /\.(ts|tsx)$/,
exclude: /node_modules/,
use: {
loader: "ts-loader"
}
}
]
},
externals: {
react: 'commonjs react',
'react-dom': 'commonjs react-dom'
},
};
Redigera: tsconfig.json
{
"compilerOptions": {
/* Visit https://aka.ms/tsconfig.json to read more about this file */
/* Basic Options */
// "incremental": true, /* Enable incremental compilation */
"target": "es5", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */
"module": "commonjs", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
"lib": [ /* Specify library files to be included in the compilation. */
"DOM",
"DOM.Iterable",
"ESNext"
],
"allowJs": true, /* Allow javascript files to be compiled. */
// "checkJs": true, /* Report errors in .js files. */
"jsx": "react", /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
// "declaration": true, /* Generates corresponding '.d.ts' file. */
// "declarationMap": true, /* Generates a sourcemap for each corresponding '.d.ts' file. */
// "sourceMap": true, /* Generates corresponding '.map' file. */
// "outFile": "./", /* Concatenate and emit output to single file. */
// "outDir": "./", /* Redirect output structure to the directory. */
// "rootDir": "./", /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
// "composite": true, /* Enable project compilation */
// "tsBuildInfoFile": "./", /* Specify file to store incremental compilation information */
// "removeComments": true, /* Do not emit comments to output. */
// "noEmit": true, /* Do not emit outputs. */
// "importHelpers": true, /* Import emit helpers from 'tslib'. */
// "downlevelIteration": true, /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
"isolatedModules": true, /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
/* Strict Type-Checking Options */
"strict": false, /* Enable all strict type-checking options. */
"noImplicitAny": false, /* Raise error on expressions and declarations with an implied 'any' type. */
"strictNullChecks": false, /* Enable strict null checks. */
"strictFunctionTypes": false, /* Enable strict checking of function types. */
"strictBindCallApply": false, /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
"strictPropertyInitialization": false, /* Enable strict checking of property initialization in classes. */
"noImplicitThis": false, /* Raise error on 'this' expressions with an implied 'any' type. */
"alwaysStrict": false, /* Parse in strict mode and emit "use strict" for each source file. */
/* Additional Checks */
// "noUnusedLocals": true, /* Report errors on unused locals. */
// "noUnusedParameters": true, /* Report errors on unused parameters. */
// "noImplicitReturns": true, /* Report error when not all code paths in function return a value. */
// "noFallthroughCasesInSwitch": true, /* Report errors for fallthrough cases in switch statement. */
/* Module Resolution Options */
// "moduleResolution": "node", /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
// "baseUrl": "./", /* Base directory to resolve non-absolute module names. */
// "paths": {}, /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
// "rootDirs": [], /* List of root folders whose combined content represents the structure of the project at runtime. */
// "typeRoots": [], /* List of folders to include type definitions from. */
// "types": [], /* Type declaration files to be included in compilation. */
// "allowSyntheticDefaultImports": true, /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
"esModuleInterop": true, /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
// "preserveSymlinks": true, /* Do not resolve the real path of symlinks. */
// "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */
/* Source Map Options */
// "sourceRoot": "", /* Specify the location where debugger should locate TypeScript files instead of source locations. */
// "mapRoot": "", /* Specify the location where debugger should locate map files instead of generated locations. */
// "inlineSourceMap": true, /* Emit a single file with source maps instead of having a separate file. */
// "inlineSources": true, /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
/* Experimental Options */
// "experimentalDecorators": true, /* Enables experimental support for ES7 decorators. */
// "emitDecoratorMetadata": true, /* Enables experimental support for emitting type metadata for decorators. */
/* Advanced Options */
"skipLibCheck": true, /* Skip type checking of declaration files. */
"forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */
}
}
Svar #1
Det låter som att problemet sannolikt beror på att man missat att ange resolve-tillägg i webpack.config. Försök att lägga till fler i den egenskapen:
resolve: {
extensions: ['.ts', '.tsx', '.js', '.jsx'],
},
Svar #2
Detta är vad som fungerade för mig efter några timmars sökande:
npm install --save-dev typescript @types/node @types/react @types/react-dom @types/jest --forceSedan skapade jag en tsconfig.json-fil och klistrade in följande kod:
{
"compilerOptions": {
"target": "es5",
"lib": ["dom", "dom.iterable", "esnext"],
"allowJs": true,
"skipLibCheck": true,
"esModuleInterop": true,
"allowSyntheticDefaultImports": true,
"strict": true,
"forceConsistentCasingInFileNames": true,
"noFallthroughCasesInSwitch": true,
"module": "esnext",
"moduleResolution": "node",
"resolveJsonModule": true,
"isolatedModules": true,
"noEmit": true,
"jsx": "react-jsx"
},
"include": ["src"]
}
Till slut startade jag om appen.