options.warn is not a function

[MattWilliamsDev]

Recent change to middleware.js broke build process. Process works on webpack-dev-server@~1.15.0, but not at ~1.18.0. Unsure where it broke in between those two.

This is the error thrown during the gulp start task:

TypeError: options.warn is not a function
    at module.exports ([project]/node_modules/webpack-dev-server/node_modules/webpack-dev-middleware/middleware.js:42:11)
    at new Server ([project]/node_modules/webpack-dev-server/lib/Server.js:53:20)
    at Gulp.<anonymous> ([project]/gulpfile.babel.js:77:9)
    at module.exports ([project]/node_modules/gulp/node_modules/orchestrator/lib/runTask.js:34:7)
    at Gulp.Orchestrator._runTask ([project]/node_modules/gulp/node_modules/orchestrator/index.js:273:3)
    at Gulp.Orchestrator._runStep ([project]/node_modules/gulp/node_modules/orchestrator/index.js:214:10)
    at [project]/node_modules/gulp/node_modules/orchestrator/index.js:279:18
    at finish ([project]/node_modules/gulp/node_modules/orchestrator/lib/runTask.js:21:8)
    at [project]/node_modules/gulp/node_modules/orchestrator/lib/runTask.js:52:4
    at f ([project]/node_modules/gulp/node_modules/orchestrator/node_modules/end-of-stream/node_modules/once/once.js:17:25)

Here is the code from my gulpfile:

gulp.task( 'serve:start', [ 'serve:static' ], () => {
    const config = webpackConfig( true, 'build', PORT );
    return new WebpackDevServer( webpack( config ), {
        contentBase: 'build',
        publicPath: config.output.publicPath,
        watchDelay: 100
    }).listen( PORT, '0.0.0.0', err => {
        if ( err ) throw new $.util.PluginError( 'webpack-dev-server', err );
        $.util.log( `[ ${ packageJson.name } serve ]`, `Listening at localhost:${ PORT }` );
    });
});

Let me know if more detail is needed.

[SpaceK33z]

This was already fixed in #131. Meanwhile, if you want to fix this, use watchOptions: { aggregateTimeout: 100 } instead.

[MattWilliamsDev]

Thank you for the reply. I worked around it via npm shrinkwrap, but will implement your suggestion as well.