add babel-polyfill

[dannycoates]

fixes #395

and before @pdehaan mentions webpack, i know, but not right now

[pdehaan]

I'll give you a 💵 if we rename this to something more grep-able like "build:vendor".

You could even combine the two:

cp node_modules/l20n/dist/web/l20n.min.js node_modules/babel-polyfill/dist/polyfill.min.js public

[pdehaan]

Do we know where the Object.entries() is coming from? I didn't see it in our source (via a quick git grep).

I mean, babel-polyfill seems like a big [96KB] hammer for an API call:

$ ls -lash node_modules/babel-polyfill/dist/polyfill.min.js | awk '{ print $6, $10 }'

96K node_modules/babel-polyfill/dist/polyfill.min.js

---

UPDATE: Actually, I think it may be coming from testpilot-ga:

$ grep "Object.entries(" -irn .

./node_modules/core-js/README.md:1476:Object.entries({a: 1, b: 2, c: 3}); // => [['a', 1], ['b', 2], ['c', 3]]
./node_modules/testpilot-ga/dist/index.js:51:      Object.entries(productDetails).forEach(([key, value]) => {
./node_modules/testpilot-ga/dist/index.js:88:      Object.entries(allOptions).forEach(([key, value]) => this[key] = value);
./node_modules/testpilot-ga/src/TestPilotGA.js:53:    Object.entries(productDetails).forEach(([key, value]) => {
./node_modules/testpilot-ga/src/TestPilotGA.js:95:    Object.entries(allOptions).forEach(([key, value]) => (this[key] = value));

/cc @chuckharmston

https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Object/entries#Browser_compatibility

[dannycoates]

I mean, babel-polyfill seems like a big [96KB] hammer for an API call

it is, but this isn't the only error in sentry the polyfill will fix

[pdehaan]

it is, but this isn't the only error in sentry the polyfill will fix

👍 Great point! Ship it. I think we were considering doing webpack+babel+transpiling (#359) anyways, so this is a great start.