babel-plugin-transform-bigint
Advanced tools
A plugin for babel to transform `x * y` into something like `JSBI.multiply(x, y)` to support bigints.
Update: Now it can convert a code using BigInt into a code using JSBI (https://github.com/GoogleChromeLabs/jsbi). It will try to detect when an operator is used for bigints, not numbers. This will not work in many cases, so please use JSBI directly only if you know, that the code works only with bigints.
Input using native BigInts:
const a = BigInt(Number.MAX_SAFE_INTEGER);
const b = 2n;
a + b;
a - b;
a * b;
a / b;
a % b;
a ** b;
a << b;
a >> b;
a & b;
a | b;
a ^ b;
-a;
~a;
a === b;
a < b;
a <= b;
a > b;
a >= b;
a.toString();
Number(a);
Compiled output using JSBI:
const a = JSBI.BigInt(Number.MAX_SAFE_INTEGER);
const b = JSBI.BigInt(2);
JSBI.add(a, b);
JSBI.subtract(a, b);
JSBI.multiply(a, b);
JSBI.divide(a, b);
JSBI.remainder(a, b);
JSBI.exponentiate(a, b);
JSBI.leftShift(a, b);
JSBI.signedRightShift(a, b);
JSBI.bitwiseAnd(a, b);
JSBI.bitwiseOr(a, b);
JSBI.bitwiseXor(a, b);
JSBI.unaryMinus(a);
JSBI.bitwiseNot(a);
JSBI.equal(a, b);
JSBI.lessThan(a, b);
JSBI.lessThanOrEqual(a, b);
JSBI.greaterThan(a, b);
JSBI.greaterThanOrEqual(a, b);
a.toString();
JSBI.toNumber(a);
¡ It is buggy !
// floor(log2(n)), n >= 1
function ilog2(n) {
let i = 0n;
while (n >= 2n**(2n**i)) {
i += 1n;
}
let e = 0n;
let t = 1n;
while (i >= 0n) {
let b = 2n**i;
if (n >= t * 2n**b) {
t *= 2n**b;
e += b;
}
i -= 1n;
}
return e;
}
// floor(sqrt(S)), S >= 0, https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method
function sqrt(S) {
let e = ilog2(S);
if (e < 2n) {
return 1n;
}
let f = e / 4n + 1n;
let x = (sqrt(S / 2n**(f * 2n)) + 1n) * 2n**f;
let xprev = x + 1n;
while (xprev > x) {
xprev = x;
x = (x + S / x) / 2n;
}
return xprev;
}
function squareRoot(value, decimalDigits) {
return (sqrt(BigInt(value) * 10n**(BigInt(decimalDigits) * 2n + 2n)) + 5n).toString();
}
npm init
npm install --save https://github.com/Yaffle/babel-plugin-transform-bigint
npm install --save-dev @babel/core @babel/cli
npm install jsbi --save
npm install --global http-server
npx babel --plugins=babel-plugin-transform-bigint test.js > test-transformed.js
http-server -p 8081
import JSBI from "./jsbi.mjs";
test.html.<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<script src="./node_modules/jsbi/dist/jsbi-umd.js"></script>
<script src="test-transformed.js"></script>
<script>
document.addEventListener("DOMContentLoaded", function (event) {
const form = document.querySelector("form");
form.oninput = function () {
const value = form.value.value;
const digits = Number(form.digits.value);
const s = squareRoot(value, digits);
// IE 11 does not support <output> element, so `form.output.value = "value";` is not working.
form.querySelector("output").textContent = '√' + value + ' ≈ ' + s.slice(0, 0 - digits - 1) + '.' + s.slice(0 - digits - 1, -1) + '…';
};
form.oninput();
}, false);
</script>
<style>
output {
overflow-wrap: break-word;
}
</style>
</head>
<body>
<form>
<div>
<label for="value">Value:</label>
<input id="value" name="value" type="number" min="2" step="1" value="2" />
</div>
<div>
<label for="digits">Number of decimal digits:</label>
<input id="digits" name="digits" type="number" min="1" step="1" value="100" />
</div>
<div>
<output id="output" name="output" for="value digits" tabindex="0"></output>
</div>
</form>
</body>
</html>
http://127.0.0.1:8081/test.html in a web browser.FAQs
A plugin for babel to transform `x * y` into something like `JSBI.multiply(x, y)` to support bigints.
The npm package babel-plugin-transform-bigint receives a total of 1,369 weekly downloads. As such, babel-plugin-transform-bigint popularity was classified as popular.
We found that babel-plugin-transform-bigint demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
Research
An advanced npm supply chain attack is leveraging Ethereum smart contracts for decentralized, persistent malware control, evading traditional defenses.
Security News
Research
Attackers are impersonating Sindre Sorhus on npm with a fake 'chalk-node' package containing a malicious backdoor to compromise developers' projects.
Security News
The npm package for the LottieFiles Player web component was hit with a supply chain attack after a software engineer's npmjs credentials were compromised.