webpack-dev-middleware

Offers a dev middleware for webpack, which arguments a live bundle to a directory

npm install webpack-dev-middleware
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webpack-dev-middleware

THIS MIDDLEWARE SHOULD ONLY USED FOR DEVELOPMENT!

DO NOT USE IT IN PRODUCTION!

What is it?

It's a simple wrapper middleware for webpack. It serves the files emitted from webpack over a connect server.

It has a few advantages over bundling it as files:

  • No files are written to disk, it handle the files in memory
  • If files changed in watch mode, the middleware no longer serves the old bundle, but delays requests until the compiling has finished. You don't have to wait before refreshing the page after a file modification.
  • I may add some specifiy optimation in future releases.

Usage

var webpackMiddleware = require("webpack-dev-middleware");
app.use(webpackMiddleware(...));

Example usage:

app.use(webpackMiddleware(webpack({
    // webpack options
    // webpackMiddleware takes a Compiler object as first parameter
    // which is returned by webpack(...) without callback.
    entry: "...",
    output: {
        path: "/"
        // no real path is required, just pass "/"
        // but it will work with other paths too.
    }
}), {
    // all options optional

    noInfo: false,
    // display no info to console (only warnings and errors)

    quiet: false,
    // display nothing to the console

    lazy: true,
    // switch into lazy mode
    // that means no watching, but recompilation on every request

    watchDelay: 300,
    // delay after change (only lazy: false)

    publicPath: "/assets/",
    // public path to bind the middleware to
    // use the same as in webpack

    headers: { "X-Custom-Header": "yes" },
    // custom headers

    stats: {
        colors: true
    }
    // options for formating the statistics
}));
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