How to divide by huge number-CodePudding

I am trying to do this:

const numerator = 268435456;
const denominator = 2 ** 64;
const decimalFraction = numerator / denominator;

To make this work, I have tried to use the code suggested here: https://stackoverflow.com/a/54409977/3846032:

const rawValue = 268435456n;
const exponent = 2n ** 64n;
const precision = 100_000_000;
const fraction = Number((rawValue * BigInt(precision)) / exponent) / precision;

When I run this in dev it works fine, but in prod I get this error:

Uncaught TypeError: can't convert BigInt to number

I believe it is coming from 2n ** 64n.

I'm using create-react-app and some digging reveals this: https://github.com/facebook/create-react-app/issues/6907#issuecomment-778178677).

Unfortunately this suggestion makes it fail in both dev and prod with an OOM error.

Any suggestions on how to make this work would be appreciated.

CodePudding user response：

Use Math.pow(2, 64) instead of 2 ** 64:

const Example = () => {

    const x = 268435456;
    const y = Math.pow(2, 64);

    return (x / y);
}

ReactDOM.render(<Example />, document.getElementById("react"));

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/17.0.1/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/17.0.1/umd/react-dom.production.min.js"></script>
<div id="react"></div>

CodePudding user response：

So it turns out the OOM I was getting was unrelated to this particular problem, so disregard that part.

As for this error:

Uncaught TypeError: can't convert BigInt to number

You can avoid it by doing Math.power(2, 64) instead of 2n ** 64n.

The issue in question: https://github.com/facebook/create-react-app/issues/11705.