vue warning error,

[BusyHe]

can i remove the error:

You are running Vue in development mode.
Make sure to turn on production mode when deploying for production.
See more tips at https://vuejs.org/guide/deployment.html

webpack.prod.conf.js

var path = require('path')
var config = require('../config')
var utils = require('./utils')
var webpack = require('webpack')
var merge = require('webpack-merge')
var baseWebpackConfig = require('./webpack.base.conf')
var ExtractTextPlugin = require('extract-text-webpack-plugin')
var HtmlWebpackPlugin = require('html-webpack-plugin')
var env = config.build.env

var webpackConfig = merge(baseWebpackConfig, {
  module: {
    loaders: utils.styleLoaders({ sourceMap: config.build.productionSourceMap, extract: true })
  },
  devtool: config.build.productionSourceMap ? '#source-map' : false,
  output: {
    path: config.build.assetsRoot,
    filename: utils.assetsPath('js/[name].[chunkhash].js'),
    chunkFilename: utils.assetsPath('js/[id].[chunkhash].js')
  },
  vue: {
    loaders: utils.cssLoaders({
      sourceMap: config.build.productionSourceMap,
      extract: true
    })
  },
  plugins: [
    // http://vuejs.github.io/vue-loader/workflow/production.html
    new webpack.DefinePlugin({
      'process.env': env
    }),
    new webpack.optimize.UglifyJsPlugin({
      compress: {
        warnings: false
      }
    }),
    new webpack.optimize.OccurenceOrderPlugin(),
    // extract css into its own file
    new ExtractTextPlugin(utils.assetsPath('css/[name].[contenthash].css')),
    // generate dist index.html with correct asset hash for caching.
    // you can customize output by editing /index.html
    // see https://github.com/ampedandwired/html-webpack-plugin
    new HtmlWebpackPlugin({
      filename: config.build.index,
      template: 'index.html',
      inject: true,
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeAttributeQuotes: true
        // more options:
        // https://github.com/kangax/html-minifier#options-quick-reference
      },
      // necessary to consistently work with multiple chunks via CommonsChunkPlugin
      chunksSortMode: 'dependency'
    }),
    // split vendor js into its own file
    new webpack.optimize.CommonsChunkPlugin({
      name: 'vendor',
      minChunks: function (module, count) {
        // any required modules inside node_modules are extracted to vendor
        return (
          module.resource &&
          /\.js$/.test(module.resource) &&
          module.resource.indexOf(
            path.join(__dirname, '../node_modules')
          ) === 0
        )
      }
    }),
    // extract webpack runtime and module manifest to its own file in order to
    // prevent vendor hash from being updated whenever app bundle is updated
    new webpack.optimize.CommonsChunkPlugin({
      name: 'manifest',
      chunks: ['vendor']
    })
  ]
})

if (config.build.productionGzip) {
  var CompressionWebpackPlugin = require('compression-webpack-plugin')

  webpackConfig.plugins.push(
    new CompressionWebpackPlugin({
      asset: '[path].gz[query]',
      algorithm: 'gzip',
      test: new RegExp(
        '\\.(' +
        config.build.productionGzipExtensions.join('|') +
        ')$'
      ),
      threshold: 10240,
      minRatio: 0.8
    })
  )
}

module.exports = webpackConfig

build.js

// https://github.com/shelljs/shelljs
require('shelljs/global')
env.NODE_ENV = 'production'

var path = require('path')
var config = require('../config')
var ora = require('ora')
var webpack = require('webpack')
var webpackConfig = require('./webpack.prod.conf')

var spinner = ora('building for production...')
spinner.start()

var assetsPath = path.join(config.build.assetsRoot, config.build.assetsSubDirectory)
rm('-rf', assetsPath)
mkdir('-p', assetsPath)

webpack(webpackConfig, function (err, stats) {
    if (err) throw err
    process.stdout.write(stats.toString({
                colors: true,
                modules: false,
                children: false,
                chunks: false,
                chunkModules: false
            }) + '\n')

    var indexPath = path.resolve(__dirname, '../dist/index.html')
    var newIndexPath = path.resolve(__dirname, '../templates')
    var newStaticPath = path.resolve(__dirname, '../static')
    rm('-rf', newIndexPath);
    rm('-rf', newStaticPath);
    mkdir('-p', newIndexPath)
    mkdir('-p', newStaticPath)
    mv(indexPath, newIndexPath)
    mv(assetsPath + '/*', newStaticPath)
    rm('-rf', config.build.assetsRoot);

    spinner.stop()
})

[BusyHe]

vue 2.1.8

[fnlctrl]

The error message has already told you what to do:
Please refer to https://vuejs.org/v2/guide/deployment.html

[BusyHe]

en，i use vue-cli，
look here

new webpack.DefinePlugin({
      'process.env': env
    }),

so why

[fnlctrl]

You need to define a string literal within quotes, as in the example:

NODE_ENV: '"production"'

instead of

env.NODE_ENV = 'production'

[BusyHe]

vue-cli prod.env.js

module.exports = {
    NODE_ENV: '"production"'
}

look

[BusyHe]

2.1.8 vue.js

if ("development" !== 'production' &&
    inBrowser && typeof console !== 'undefined') {
  console[console.info ? 'info' : 'log'](
    "You are running Vue in development mode.\n" +
    "Make sure to turn on production mode when deploying for production.\n" +
    "See more tips at https://vuejs.org/guide/deployment.html"
  );
}

[fnlctrl]

In your build.js

Edit: it was in vue-cli generated file, sorry.

Since it's a vue-cli issue, please open an issue at vue-cli's repo instead, thanks!

[BusyHe]

no, it can`t solve

NODE_ENV: '"production"'

the code is Error

[BusyHe]

en,thanks

[BusyHe]

[narwajea]

The solution is explained here: https://github.com/vuejs/vue/issues/4694

Indeed, here is the check implemented in vue.common.js:

if (process.env.NODE_ENV !== 'production' &&
    inBrowser && typeof console !== 'undefined') {
  console[console.info ? 'info' : 'log'](
    "You are running Vue in development mode.\n" +
    "Make sure to turn on production mode when deploying for production.\n" +
    "See more tips at https://vuejs.org/guide/deployment.html"
  );
}

Detailed explanation can be found here: https://github.com/vuejs/vue/blob/5300e717fa52480bf301453beabbd863eeff0d8c/dist/README.md

[le0zh0u]

It is not work for me. In the webpack.base.conf.js:
alias: { 'vue$': 'vue/dist/vue.common.js', 'src': resolve('src'), 'assets': resolve('src/assets'), 'components': resolve('src/components') }
In the prod.env.js:
module.exports = { NODE_ENV: '"production"' }
when webpack running, the value of process.env.NODE_ENV equals to production. But the value will equal to development when rendering the page.
How can I fix it? Thanks.

[LinusBorg]

So I cleaned up this thread from unrelated comments. Please use forum.vuejs.org or chat.vuejs.org for questions and problems you have.