Webpack plugin to fix missing module default export
Please use esModuleInterop
option that is available since TypeScript 2.7 to use default imports in the same way as in Babel.
With Babel transpiler you could write:
import React from 'react';
import ReactDOM from 'react-dom';
In this case Babel will be able to resolve module.exports.default
as
modules.exports
if module.exports.default
is not defined.
It doesn't work with TypeScript compiler which targets ES5, so we have to use:
import * as React from 'react';
import * as ReactDOM from 'react-dom';
One well know workaround for this issue is to use TWO transpilers, typescript first targeted to ES6 and Babel second targeted to ES5. Extra transpilation takes more time and break source maps.
The other solution is to hook into webpack's require()
implementation and
polyfill module.exports.default
if it is blank and module is not ES6 module.
This plugin hooks into require()
and try to polyfill module.exports.default
.
npm install --save-dev webpack-fix-default-import-plugin
webpack.config.js
example:
var FixDefaultImportPlugin = require('webpack-fix-default-import-plugin');
module.exports = {
...
plugins: [
...
new FixDefaultImportPlugin()
],
};
tsconfig.json
example:
{
"compilerOptions": {
"sourceMap": true,
"noImplicitAny": true,
"noEmitHelpers": true,
"allowSyntheticDefaultImports": true, // required
"module": "commonjs", // required
"target": "es5", // required
"jsx": "react"
},
"exclude": [
"node_modules",
"typings/globals"
]
}
tslint.json
example:
{
...
"rules": {
...
"no-unused-variable": [true, {"ignore-pattern": "^(React|ReactDOM)$"}],
"import-name": false,
"no-default-export": false
}
}