How do I install the babel-polyfill library

0 votes

I just started to use Babel to compile my ES6 javascript code into ES5. When I start to use Promises it looks like it's not working. The Babel website states support for promises via polyfills.

I tried to add:

require("babel/polyfill");

or

import * as p from "babel/polyfill";

With that I'll get the following error on my app bootstrapping:

Cannot find module 'babel/polyfill'

I also tried to add the old and good bluebird NPM but it looks like it's not working.

How to use the polyfills from Babel?

Jul 17, 2020 in Node-js by kartik
• 37,490 points
194 views

1 answer to this question.

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Hello @kartik,

If your package.json looks something like the following:

  ...
  "devDependencies": {
    "babel": "^6.5.2",
    "babel-eslint": "^6.0.4",
    "babel-polyfill": "^6.8.0",
    "babel-preset-es2015": "^6.6.0",
    "babelify": "^7.3.0",
  ...

And you get the Cannot find module 'babel/polyfill' error message, then you probably just need to change your import statement FROM:

import "babel/polyfill";

TO:

import "babel-polyfill";

And make sure it comes before any other import statement 

Hope it is helpful!!
Thank you!!

answered Jul 17, 2020 by Niroj
• 82,680 points

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