cnweibo
Hi, when i follow your instruction, there is following error: ``` node_modules\[email protected]\lib\options.js:78 let extensions = Array.isArray(options.extensions) ? [...options.extensions] : [options.extensions]; ^^^ SyntaxError: Unexpected token ... at exports.runInThisContext (vm.js:53:16) at Module._compile (module.js:373:25) at Object.Module._extensions..js (module.js:416:10) at Module.load (module.js:343:32) at Function.Module._load (module.js:300:12) at Module.require (module.js:353:17) at require (internal/module.js:12:17) at Object.<anonymous> (C:\Users\Administrator\devenvironment\Code\webpackstudy\node_modules\[email protected]\lib\CssEntryPlugin.js:13:16) at Module._compile (module.js:409:26) at Object.Module._extensions..js (module.js:416:10) at Module.load (module.js:343:32) at Function.Module._load (module.js:300:12) at Module.require (module.js:353:17) at require (internal/module.js:12:17) at Object.<anonymous> (C:\Users\Administrator\devenvironment\Code\webpackstudy\node_modules\[email protected]\lib\index.js:7:23) at Module._compile (module.js:409:26) ```