部署到Heroku的NodeJS应用程序不支持异步功能

Question

I'm trying to implement asynchronous functionality in one of my routes in a NodeJS app. It works when I run it on localhost but when deployed to heroku, an error unexpected token ( is thrown in the first line of the following code:

router.post('/post', async(req,res) => {
    const data = await getData();
    //do stuff

})

I'm a little confused as to why this works in one environment and not the other. Are there heroku configurations I'm missing? Do I need to explicitly add support for ES2016/2017 in Heroku?

Answer 1

Heroku defaults to the latest Long Term Support version of Node (which, as of writing, is v6.11.1) if you don't set a specific version.

async/await has been available in Node since v7.6, so you'll need to explicitly specify at least that version in your package.json , as documented here: https://devcenter.heroku.com/articles/nodejs-support#specifying-a-node-js-version

Answer 2

you can refer this link

Es6_hrku

You need to convert your ES6 to ES5 in order to make it happen on heroku. Changes required in package.json.