Babel 6 regeneratorRuntime is not defined

Question

I\'m trying to use async, await from scratch on Babel 6, but I\'m getting regeneratorRuntime is not defined.

.babelrc file

{
    \"presets\": [ \"es2         


        

Answer 1

Be careful of hoisted functions

I had both my 'polyfill import' and my 'async function' in the same file, however I was using the function syntax that hoists it above the polyfill which would give me the ReferenceError: regeneratorRuntime is not defined error.

Change this code

import "babel-polyfill"
async function myFunc(){ }

to this

import "babel-polyfill"
var myFunc = async function(){}

to prevent it being hoisted above the polyfill import.