BigInt polyfill?

[xtuc]

The BigInt proposal is currently in Stage 3, see https://github.com/tc39/proposal-bigint.

We could use it in Babel babel/babel#6015.

[zloirock]

The problem here - BigInt is mainly about internal abstract JS operations, not built-it. Full BigInt built-it API is:

class BigInt {
  constructor(value): bigint;
  static asUintN(bits, bigint): bigint;
  static asIntN(bits, bigint) : bigint;
  toString(radix): string;
  toLocaleString(radix): string;
  valueOf(): bigint;
  @@toStringTag: 'BigInt';
}

Also required extensions of some existent features.

So, Babel can interact with BigInt built-in only through BigInt constructor and toString method -> Babel should implement all abstract operations in helpers instead of calling BigInt methods like in PR, otherwise, you will not be able to interact with native BigInt. Wrapping almost all operators makes this transform unusable for real projects. So I'm confused.

After some days I'll merge v3 branch to master branch, after that feel free add a PR with BigInt polyfill - let's explore what we can do.

[NN---]

https://github.com/GoogleChromeLabs/jsbi

[zloirock]

(Just a note: JSBI is not a polyfill, it's like to say that regenerator is a polyfill for generators and with the current core-js approach it can't be integrated to core-js.)

[zloirock]

I think that it's better to close this issue, I'll add a link to it to the README. If someone has any thoughts about it - write it here.