下載的版本是"babel-preset-env": "^1.6.1",

下面是webpack配置文件，babel按官網(wǎng)說明配置的

module.exports = {
    entry: __dirname + '/app/index.js',
    output: {
        path: __dirname + '/dist',
        filename: 'bundle.js'
    },
    module: {
        rules: [
            {
              test: /\.js$/,
              exclude: /(node_modules|bower_components)/,
              use: {
                loader: 'babel-loader',
                options: {
                  presets: ['@babel/preset-env']
                }
              }
            },
            {
                test: /\.css$/,
                loader: "style!css"
            },
            {
                test: /\.less/,
                loader: 'style-loader!css-loader!less-loader'
            }
        ]
    }
}

index.js：

import React from 'react';

console.log(react.version);

目錄：