How to properly use webpack?

Question

webpack

Installed yii2, now you need to run it through webpack, the configuration file is already there, but it gives the following error:

E:\gag\api\webpack.config.babel.js:4
import path from 'path';
^^^^^^

SyntaxError: Cannot use import statement outside a module
    at new Script (vm.js:88:7)
    at NativeCompileCache._moduleCompile (E:\gag\api\node_modules\v8-compile-cache\v8-compile-cache.js:242:18)
    at Module._compile (E:\gag\api\node_modules\v8-compile-cache\v8-compile-cache.js:186:36)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1159:10)
    at Module.load (internal/modules/cjs/loader.js:988:32)
    at Function.Module._load (internal/modules/cjs/loader.js:896:14)
    at Module.require (internal/modules/cjs/loader.js:1028:19)
    at require (E:\gag\api\node_modules\v8-compile-cache\v8-compile-cache.js:161:20)
    at WEBPACK_OPTIONS (E:\gag\api\node_modules\webpack-cli\bin\convert-argv.js:133:13)
    at requireConfig (E:\gag\api\node_modules\webpack-cli\bin\convert-argv.js:135:6)
    at E:\gag\api\node_modules\webpack-cli\bin\convert-argv.js:142:17
    at Array.forEach (<anonymous>)
    at module.exports (E:\gag\api\node_modules\webpack-cli\bin\convert-argv.js:140:15)
    at E:\gag\api\node_modules\webpack-cli\bin\cli.js:241:39
    at Object.parse (E:\gag\api\node_modules\yargs\yargs.js:567:18)
    at E:\gag\api\node_modules\webpack-cli\bin\cli.js:219:8
    at Object.<anonymous> (E:\gag\api\node_modules\webpack-cli\bin\cli.js:538:3)
    at Module._compile (internal/modules/cjs/loader.js:1139:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1159:10)
    at Module.load (internal/modules/cjs/loader.js:988:32)
    at Function.Module._load (internal/modules/cjs/loader.js:896:14)
    at Module.require (internal/modules/cjs/loader.js:1028:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at module.exports (C:\Users\mrsta\AppData\Roaming\npm\node_modules\webpack-cli\node_modules\import-local\index.js:16:66)
    at C:\Users\mrsta\AppData\Roaming\npm\node_modules\webpack-cli\bin\cli.js:15:6
    at Object.<anonymous> (C:\Users\mrsta\AppData\Roaming\npm\node_modules\webpack-cli\bin\cli.js:366:3)
    at Module._compile (internal/modules/cjs/loader.js:1139:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1159:10)
    at Module.load (internal/modules/cjs/loader.js:988:32)
    at Function.Module._load (internal/modules/cjs/loader.js:896:14)

How to be? What's wrong here?