I have a React application with Components written in ES6 - transpiled via Babel and Webpack.
In some places I would like to include specific CSS files with specific Components, as suggested in react webpack cookbook
However, if in any Component file I require a static CSS asset, eg:
import '../assets/css/style.css';
Then the compilation fails with an error:
SyntaxError: <PROJECT>/assets/css/style.css: Unexpected character '#' (3:0)
at Parser.pp.raise (<PROJECT>\node_modules\babel-core\lib\acorn\src\location.js:73:13)
at Parser.pp.getTokenFromCode (<PROJECT>\node_modules\babel-core\lib\acorn\src\tokenize.js:423:8)
at Parser.pp.readToken (<PROJECT>\node_modules\babel-core\lib\acorn\src\tokenize.js:106:15)
at Parser.<anonymous> (<PROJECT>\node_modules\babel-core\node_modules\acorn-jsx\inject.js:650:22)
at Parser.readToken (<PROJECT>\node_modules\babel-core\lib\acorn\plugins\flow.js:694:22)
at Parser.pp.nextToken (<PROJECT>\node_modules\babel-core\lib\acorn\src\tokenize.js:98:71)
at Object.parse (<PROJECT>\node_modules\babel-core\lib\acorn\src\index.js:105:5)
at exports.default (<PROJECT>\node_modules\babel-core\lib\babel\helpers\parse.js:47:19)
at File.parse (<PROJECT>\node_modules\babel-core\lib\babel\transformation\file\index.js:529:46)
at File.addCode (<PROJECT>\node_modules\babel-core\lib\babel\transformation\file\index.js:611:24)
It seems that if I try and require a CSS file in a Component file, then the Babel loader will interpret that as another source and try to transpile the CSS into Javascript.
Is this expected? Is there a way to achieve this - allowing transpiled files to explicitly reference static assets that are not to be transpiled?
I have specified loaders for both .js/jsx and CSS assets as follows:
module: {
loaders: [
{ test: /\.css$/, loader: "style-loader!css-loader" },
{ test: /\.(js|jsx)$/, exclude: /node_modules/, loader: 'babel'}
]
}
View the full webpack config file
FULL DETAILS BELOW:
webpack.common.js - A base webpack config I use, so I can share properties between dev and production.
Gruntfile.js - Gruntfile used for development. As you can see it requires the webpack config above and adds some development properties to it. Could this be causing the problem?
Html.jsx - My HTML jsx component that tries to import/require the CSS. This is an isomorphic app (using Fluxbile), hence needing to have the actual HTML as a rendered component. Using the require statement seen in this file, in any part of my application, gives the error described.
It seems to be something to do with grunt. If I just compile with webpack --config webpack.common.js
then I get no errors.
Short answer: It's a node runtime error. Trying to load CSS on the server in isomorphic apps is not a good idea.
You can't require css in the component that you are rendering on the server. One way to deal with it is to check if it's a browser before requiring css.
if (process.env.BROWSER) {
require("./style.css");
}
In order to make it possible you should set process.env.BROWSER
to false
(or delete it) on the server
server.js
delete process.env.BROWSER;
...
// other server stuff
and set it to true
for the browser. You do it with webpack's DefinePlugin in the config -
webpack.config.js
plugins: [
...
new webpack.DefinePlugin({
"process.env": {
BROWSER: JSON.stringify(true)
}
})
]
You can see this in action in gpbl's Isomorphic500 app.