[BUG] Please do not load core-js/promise polyfill in the package

[chenxinyanc]

Describe the bug
Please remove the following line

dataframe-js/lib/io.js

Line 9 in 9d6226a

require("core-js/modules/es.promise");

Actually, I don't think it should ever be library's responsibility to set up polyfills. You may require user to install and configure them by themselves.

This package have hard dependency on core-js/promise polyfill. When used with Angular, we cannot ensure Promise polyfill is loaded before zone.js (a dependency of Angular) is loaded. Note that we are using separate js files and the js file using dataframe-js is loaded after the Angular app is loaded. Due to angular/zone.js#783 and zloirock/core-js#319, when core-js/promise module is loading, it will replace window.Promise from ZoneAwarePromise (patched by zone.js) back to native Promise, and breaks Angular's change detection.

To Reproduce
Steps to reproduce the behavior:

Expected behavior

Screenshots

Desktop (please complete the following information):

• OS: Windows
• Browser: Chrominum Edge
• Version: Dev 77.0.235.5

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context

[Gmousse]

Hi @chenxinyanc,
Thank you for your report.

JS ecosystem can be an incredible mess sometimes.
I will see to create a temporary workaround (I can't drop core-js just like that, or I will take one thousand issues).
Stay tuned.

[davir85]

I have the same issue. Any update?

[Gmousse]

Sorry I was in holidays,
I will try to fix it monday.

[Gmousse]

Sorry for the delay, I wasn't active on github these days.
I m working on a solution.