javascript-Webpack提供下划线的全局使用插件-错误

我正在尝试通过Webpack ProvidePlugin全局使用下划线,但是无法识别下划线,并且在控制台中出现以下错误.

VM43994:1 Uncaught ReferenceError: _ is not defined(…)

我在我的index.js中导入下划线(也许现在我正在使用供应商捆绑包？现在不需要了吗？),我的webpack配置如下.在一个阶段,我以为我已经开始工作了(在进行供应商捆绑销售之前),但是现在我认为我可能已经弄错了,因为我觉得自己已经尝试了之前尝试过的所有方法.任何帮助将不胜感激.

const webpack = require('webpack');
const path = require('path');
const precss = require('precss');
const autoprefixer = require('autoprefixer');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const postcssImport = require('postcss-import');

module.exports = {

  context: __dirname + '/frontend',
  devtool: 'source-map',
  entry: {
    app: './index.js',
    vendor: ['underscore'],
  },
  output: {
    filename: 'bundle.js',
    path: path.join(__dirname, './static'),
  },
  module: {
    loaders: [
    { test: /\.js$/, loader: 'babel', exclude: /node_modules/, query: { presets: ['es2015'] } },
    { test: /\.css$/, loader: ExtractTextPlugin.extract('style', 'css?sourceMap&importLoaders=1!postcss') },
    ],
  },
  plugins: [
    new ExtractTextPlugin('si-styles.css'),
    new webpack.ProvidePlugin({ underscore: 'underscore' }),
    new webpack.optimize.CommonsChunkPlugin(/* chunkName= */'vendor', /* filename= */'vendor.bundle.js', Infinity),
  ],
  postcss: function(webpack) {
    return [
      postcssImport({ addDependencyTo: webpack }), // Must be first item in list
      precss,
      autoprefixer({ browsers: ['last 2 versions'] }),
    ];
  },

};

解决方法:

多一点调查和this seems to work

{
    plugins: [
        new webpack.ProvidePlugin({
            _: 'underscore'
        })
    ]
}

同样在您的TS文件中,您可以添加window [‘_’] = require(‘下划线’)

标签：webpack,underscore-js,javascript
来源： https://codeday.me/bug/20191118/2028584.html