Essayer de convertir une application React sur TypeScript et se heurter à des erreurs étranges.
node_modules/@ types/react/index "'n'a pas d'exportation par défaut.
node_modules/@ types/react-dom/index "'n'a pas d'exportation par défaut.
J'ai ma configuration tsconfig et webpack pour TypeScript. Après avoir modifié l'extension de ce composant de .js
à .tsx
Je reçois des erreurs pour React?
Pensées?
tsconfig.json
{
"compilerOptions": {
"outDir": "./moonholdings/",
"sourceMap": true,
"noImplicitAny": true,
"module": "commonjs",
"target": "es5",
"jsx": "react"
},
"include": [
"./app/**/*"
]
}
webpack
/* eslint-disable no-console */
import webpack from 'webpack';
import HtmlWebpackPlugin from 'html-webpack-plugin';
import ExtractTextPlugin from 'extract-text-webpack-plugin';
import CopyWebpackPlugin from 'copy-webpack-plugin';
import path from 'path';
import chalk from 'chalk';
const moonholdings = path.resolve(__dirname, 'moonholdings');
const app = path.resolve(__dirname, 'app');
const nodeModules = path.resolve(__dirname, 'node_modules');
const HtmlWebpackPluginConfig = new HtmlWebpackPlugin({
template: path.join(__dirname, '/app/index.html'),
inject: 'body'
});
const ExtractTextPluginConfig = new ExtractTextPlugin({
filename: 'moonholdings.css',
disable: false,
allChunks: true
});
const CopyWebpackPluginConfigOptions = [{
from: 'app/static',
to: 'static/'
}];
const CopyWebpackPluginConfig = new CopyWebpackPlugin(CopyWebpackPluginConfigOptions);
const PATHS = {
app,
build: moonholdings
};
const LAUNCH_COMMAND = process.env.npm_lifecycle_event;
const isProduction = LAUNCH_COMMAND === 'production';
process.env.BABEL_ENV = LAUNCH_COMMAND;
const productionPlugin = new webpack.DefinePlugin({
'process.env': {
NODE_ENV: JSON.stringify('production')
}
});
const base = {
// entry: ['babel-polyfill', PATHS.app],
entry: './app/index.tsx',
output: {
path: PATHS.build,
publicPath: '/',
filename: 'index_bundle.js'
},
resolve: {
modules: [app, nodeModules],
extensions: ['.ts', '.tsx', '.js', '.json']
},
module: {
rules: [
// All files with a '.ts' or '.tsx' extension will be handled by 'awesome-TypeScript-loader'.
{ test: /\.tsx?$/, loader: 'awesome-TypeScript-loader' },
{
test: /\.js$/,
loader: 'babel-loader',
exclude: /node_modules/
},
{
test: /\.s?css/,
use: [
'style-loader',
'css-loader',
'sass-loader'
]
},
{
test: /\.(png|jpg|jpeg|gif|svg|woff|woff2|ttf|eot)/,
loader: 'file-loader?name=[path][name].[ext]'
},
// All output '.js' files will have any sourcemaps re-processed by 'source-map-loader'.
{ enforce: 'pre', test: /\.js$/, loader: 'source-map-loader' }
]
}
};
const developmentConfig = {
devtool: 'cheap-module-inline-source-map',
devServer: {
contentBase: moonholdings
},
plugins: [
CopyWebpackPluginConfig,
ExtractTextPluginConfig,
HtmlWebpackPluginConfig
]
};
const productionConfig = {
devtool: 'cheap-module-source-map',
plugins: [
CopyWebpackPluginConfig,
ExtractTextPluginConfig,
HtmlWebpackPluginConfig,
productionPlugin
]
};
console.log(`${chalk.Magenta('฿')} ${chalk.green('yarn run:')} ${chalk.red(LAUNCH_COMMAND)}`);
export default Object.assign(
{}, base,
isProduction === true ? productionConfig : developmentConfig
);
Vous devez utiliser import * as React from "react";
au lieu de import React from 'react'
.
Cela se produit parce que babel (celui que vous utilisiez auparavant) suppose que modules.export est l'exportation par défaut, contrairement à TypeScript (celui que vous utilisez maintenant).
Vous pouvez utiliser cette syntaxe en ajoutant simplement "allowSyntheticDefaultImports": true
à ton tsconfig.json