webpack 2 syntax for preloader (`enforce: 'pre'`) return error

[olivier-o]

using the webpack 2 syntax for preloader (enforce: 'pre') ...

loaders: [
      {
        test: /\.jsx?$/,
        loader: 'eslint-loader?{fix: true}',
        exclude: /node_modules/,
        enforce: 'pre'
      },

return "enforce" is not allowed error message. Will be glad to work on a fix, if someone can point me to where this validation is happening

[hinok]

Have the same problem. In the readme is written that

Note that as of webpack v2 (currently in beta), configuration validation is baked in.

So for webpack 2, there is no reason to use webpack-validator? I found something in the webpack repository

• Issue: https://github.com/webpack/webpack/issues/2971
• PR: https://github.com/webpack/webpack/pull/2974

Could someone explain it clearly?

---

It looks that webpack 2 has config validation, after removing webpack-validator I got this very nice written error

/Users/dk/Desktop/Dev/code-splitting/node_modules/webpack/lib/webpack.js:17
                throw new WebpackOptionsValidationError(webpackOptionsValidationErrors);
                ^
WebpackOptionsValidationError: Invalid configuration object. Webpack has been initialised using a configuration object that does not match the API schema.
 - configuration has an unknown property 'eslint'. These properties are valid:
   object { amd?, bail?, cache?, context?, dependencies?, devServer?, devtool?, entry, externals?, loader?, module?, name?, node?, output?, plugins?, profile?, recordsInputPath?, recordsOutputPath?, recordsPath?, resolve?, resolveLoader?, stats?, target?, watch?, watchOptions? }
   For typos: please correct them.
   For loader options: webpack 2 no longer allows custom properties in configuration.
     Loaders should be updated to allow passing options via loader options in module.rules.
     Until loaders are updated one can use the LoaderOptionsPlugin to pass these options to the loader:
     plugins: [
       new webpack.LoaderOptionsPlugin({
         // test: /\.xxx$/, // may apply this only for some modules
         options: {
           eslint: ...
         }
       })
     ]
    at webpack (/Users/dk/Desktop/Dev/code-splitting/node_modules/webpack/lib/webpack.js:17:9)
    at Object.<anonymous> (/Users/dk/Desktop/Dev/code-splitting/webpack/webpack-dev-server.js:23:18)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.runMain (module.js:604:10)
    at run (bootstrap_node.js:394:7)
    at startup (bootstrap_node.js:149:9)
    at bootstrap_node.js:509:3

So nice!

[biswassuman23]

Same issue what is the solution?

[kentcdodds]

The solution is to not use this package with Webpack 2 anymore. It's no longer necessary. Please see the notice in the README. Cheers!