Field 'browser' doesn't contain a vali

Question

I've started using webpack2 (to be precise, v2.3.2) and after re-creating my config I keep running into an issue that I can't seem to solve. I get (sorry in advance for ugly dump):

ERROR in ./src/main.js
Module not found: Error: Can't resolve 'components/DoISuportIt' in '[absolute path to my repo]/src'
resolve 'components/DoISuportIt' in '[absolute path to my repo]/src'
  Parsed request is a module
  using description file: [absolute path to my repo]/package.json (relative path: ./src)
    Field 'browser' doesn't contain a valid alias configuration
    aliased with mapping 'components': '[absolute path to my repo]/src/components' to '[absolute path to my repo]/src/components/DoISuportIt'
      using description file: [absolute path to my repo]/package.json (relative path: ./src)
        Field 'browser' doesn't contain a valid alias configuration
      after using description file: [absolute path to my repo]/package.json (relative path: ./src)
        using description file: [absolute path to my repo]/package.json (relative path: ./src/components/DoISuportIt)
          as directory
            [absolute path to my repo]/src/components/DoISuportIt doesn't exist
          no extension
            Field 'browser' doesn't contain a valid alias configuration
            [absolute path to my repo]/src/components/DoISuportIt doesn't exist
          .js
            Field 'browser' doesn't contain a valid alias configuration
            [absolute path to my repo]/src/components/DoISuportIt.js doesn't exist
          .jsx
            Field 'browser' doesn't contain a valid alias configuration
            [absolute path to my repo]/src/components/DoISuportIt.jsx doesn't exist
[[absolute path to my repo]/src/components/DoISuportIt]
[[absolute path to my repo]/src/components/DoISuportIt]
[[absolute path to my repo]/src/components/DoISuportIt.js]
[[absolute path to my repo]/src/components/DoISuportIt.jsx]

package.json

{
  "version": "1.0.0",
  "main": "./src/main.js",
  "scripts": {
    "build": "webpack --progress --display-error-details"
  },
  "devDependencies": {
    ...
  },
  "dependencies": {
    ...
  }
}

In terms of the browser field it's complaining about, the documentation I've been able to find on this is: package-browser-field-spec. There is also webpack documentation for it, but it seems to have it turned on by default: aliasFields: ["browser"]. I tried adding a browser field to my package.json but that didn't seem to do any good.

webpack.config.js

import path from 'path';
const source = path.resolve(__dirname, 'src');

export default {
  context: __dirname,
  entry: './src/main.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: '[name].js',
  },
  resolve: {
    alias: {
      components: path.resolve(__dirname, 'src/components'),
    },
    extensions: ['.js', '.jsx'],
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        include: source,
        use: {
          loader: 'babel-loader',
          query: {
            cacheDirectory: true,
          },
        },
      },
      {
        test: /\.css$/,
        include: source,
        use: [
          { loader: 'style-loader' },
          {
            loader: 'css-loader',
            query: {
              importLoader: 1,
              localIdentName: '[path]___[name]__[local]___[hash:base64:5]',
              modules: true,
            },
          },
        ],
      },
    ],
  },
};

src/main.js

import DoISuportIt from 'components/DoISuportIt';

src/components/DoISuportIt/index.jsx

export default function() { ... }

For completeness, .babelrc

{
  "presets": [
    "latest",
    "react"
  ],
  "plugins": [
    "react-css-modules"
  ],
  "env": {
    "production": {
      "compact": true,
      "comments": false,
      "minified": true
    }
  },
  "sourceMaps": true
}

What am I doing wrong/missing?

Answer 1

Changed my entry to

entry: path.resolve(__dirname, './src/js/index.js'),

and it worked.

Answer 2

I had the same issue, but mine was because of wrong casing in path:

// Wrong - uppercase C in /pathCoordinate/
./path/pathCoordinate/pathCoordinateForm.component

// Correct - lowercase c in /pathcoordinate/
./path/pathcoordinate/pathCoordinateForm.component

Answer 3

For anyone building an ionic app and trying to upload it. Make sure you added at least one platform to the app. Otherwise you will get this error.

Answer 4

In my situation, I did not have an export at the bottom of my webpack.config.js file. Simply adding

export default Config;

solved it.

Answer 5

In my case it was a package that was installed as a dependency in package.json with a relative path like this:

"dependencies": {
  ...
  "phoenix_html": "file:../deps/phoenix_html"
},

and imported in js/app.js with import "phoenix_html"

This had worked but after an update of node, npm, etc... it failed with the above error-message.

Changing the import line to import "../../deps/phoenix_html" fixed it.

Answer 6

In my case, to the very end of the webpack.config.js, where I should exports the config, there was a typo: export(should be exports), which led to failure with loading webpack.config.js at all.

const path = require('path');

const config = {
    mode: 'development',
    entry: "./lib/components/Index.js",
    output: {
        path: path.resolve(__dirname, 'public'),
        filename: 'bundle.js'
    },
    module: {
        rules: [
            {
                test: /\.js$/,
                loader: 'babel-loader',
                exclude: path.resolve(__dirname, "node_modules")
            }
        ]
    }
}

// pay attention to "export!s!" here
module.exports = config;