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This repository was archived by the owner on Apr 8, 2020. It is now read-only.
This repository was archived by the owner on Apr 8, 2020. It is now read-only.

Error after upgrading to latest webpack 2.1 beta #460

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Error after upgrading to latest webpack 2.1 beta#460

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@Maarten88
Maarten88
opened on Nov 24, 2016

In a project that uses Microsoft.AspNetCore.ReactServices I upgraded webpack to the latest beta (that I read will turn final soon) and got this error:

Exception: Call to Node module failed with error: TypeError: Cannot read property 'forEach' of undefined
at Object.addReactHotModuleReplacementBabelTransform (node_modules\aspnet-webpack-react\HotModuleReplacement.js:3:33)
at attachWebpackDevMiddleware (node_modules\aspnet-webpack\WebpackDevMiddleware.js:61:38)

this happens on the line:

app.UseWebpackDevMiddleware(new WebpackDevMiddlewareOptions
{
    HotModuleReplacement = true,
    ReactHotModuleReplacement = true
});

I think this is caused by the renaming (in webpack 2.1 beta 23) of module loaders to module rules, which I had to change in my webpack.config.

The line that causes the error is:

webpackConfig.module.loaders.forEach(function (loaderConfig) {

If I change this line to

webpackConfig.module.rules.forEach(function (loaderConfig) {

Everything seems to work as before.

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