$ gulp

[22:03:25] Requiring external module babel-register

F:\Revise\es6\node_modules\babel-core\lib\transformation\file\options\option-manager.js:328

        throw e;

        ^

Error: Couldn't find preset "es2015" relative to directory "F:\\Revise\\es6"

    at F:\Revise\es6\node_modules\babel-core\lib\transformation\file\options\option-manager.js:293:19

    at Array.map (<anonymous>)

    at OptionManager.resolvePresets (F:\Revise\es6\node_modules\babel-core\lib\transformation\file\options\option-manager.js:275:20)

    at OptionManager.mergePresets (F:\Revise\es6\node_modules\babel-core\lib\transformation\file\options\option-manager.js:264:10)

    at OptionManager.mergeOptions (F:\Revise\es6\node_modules\babel-core\lib\transformation\file\options\option-manager.js:249:14)

    at OptionManager.init (F:\Revise\es6\node_modules\babel-core\lib\transformation\file\options\option-manager.js:368:12)

    at compile (F:\Revise\es6\node_modules\babel-register\lib\node.js:103:45)

    at loader (F:\Revise\es6\node_modules\babel-register\lib\node.js:144:14)

    at Object.require.extensions.(anonymous function) [as .js] (F:\Revise\es6\node_modules\babel-register\lib\node.js:154:7)

    at Module.load (internal/modules/cjs/loader.js:653:32）