$ gulp
[18:09:47] Failed to load external module @babel/register
[18:09:47] Requiring external module babel-register
C:\users\astros\file\es6pro\node_modules\[email protected]@babel-core\lib\transformation\file\opti        ons\build-config-chain.js:154
      throw err;
      ^

SyntaxError: C:\users\astros\file\es6pro\.babelrc: Error while parsing JSON - Unexpected EOF at lin        e 1 column 2 of the JSON5 data. Still to read: ""
    at error (C:\users\astros\file\es6pro\node_modules\[email protected]@json5\lib\json5.js:56:25)
    at word (C:\users\astros\file\es6pro\node_modules\[email protected]@json5\lib\json5.js:393:13)
    at value (C:\users\astros\file\es6pro\node_modules\[email protected]@json5\lib\json5.js:493:56)
    at Object.parse (C:\users\astros\file\es6pro\node_modules\[email protected]@json5\lib\json5.js:508:1        8)
    at ConfigChainBuilder.addConfig (C:\users\astros\file\es6pro\node_modules\[email protected]@ba        bel-core\lib\transformation\file\options\build-config-chain.js:150:65)
    at ConfigChainBuilder.findConfigs (C:\users\astros\file\es6pro\node_modules\[email protected]@        babel-core\lib\transformation\file\options\build-config-chain.js:96:16)
    at buildConfigChain (C:\users\astros\file\es6pro\node_modules\[email protected]@babel-core\lib        \transformation\file\options\build-config-chain.js:61:13)
    at OptionManager.init (C:\users\astros\file\es6pro\node_modules\[email protected]@babel-core\l        ib\transformation\file\options\option-manager.js:354:58)
    at compile (C:\users\astros\file\es6pro\node_modules\[email protected]@babel-register\lib\        node.js:103:45)
    at loader (C:\users\astros\file\es6pro\node_modules\[email protected]@babel-register\lib\n        ode.js:144:14)

The reason why

occurs above is because babelrc is empty

, in babelirc.js, write

//presets转成2015
//写法需安装cnpm install babel-preset-es2015 --save-dev
{
  "presets":["es2015"]
}

ok