Babel 6不会传输我的代码

这是我的代码

require('babel-register') require('babel-polyfill') const Koa = require('koa'); const app = new Koa(); // logger app.use(async (ctx, next) => { const start = new Date; await next(); const ms = new Date - start; console.log(`${ctx.method} ${ctx.url} - ${ms}ms`); }); // response app.use(ctx => { ctx.body = 'Hello World'; }); app.listen(3000); 

Koa v2.0采用async/await的例子。 不幸的是它不工作。 我得到以下错误：

 app.use(async (ctx, next) => { SyntaxError: Unexpected token ( 

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这是package.json 。

 { "name": "app", "version": "0.0.1", "scripts": { "start": "node index" }, "dependencies": { "koa": "^2.0.0-alpha.3" }, "devDependencies": { "babel-plugin-transform-async-to-generator": "^6.3.13", "babel-polyfill": "^6.3.14", "babel-preset-stage-0": "^6.3.13", "babel-register": "^6.3.13", "eslint": "^1.10.3" } } 

这是我的.babelrc

 { "presets": ["stage-0"], "plugins": ["transform-async-to-generator"] } 

Answer 1

解决了。 它还需要包含es2015预设，并将挂钩移到另一个文件