jsbi-compat

jsbi-compat provides JSBI-style bigint operations. The default export uses native BigInt when available and falls back to JSBI when it is absent. The named JSBI export always uses the JSBI implementation.

Each implementation's isBigInt(value) recognizes its own values: native bigint primitives for the native adapter, or JSBI instances for the polyfill.

See JSBI for bigint operation details. For the full upstream API, including generic ADD, mixed-type EQ/NE equality and DataView helpers, use the named JSBI export.

npm install jsbi-compat

var JSBI = require('jsbi-compat');

var max = JSBI.BigInt(Number.MAX_SAFE_INTEGER);
console.log(String(max));
// → '9007199254740991'
var other = JSBI.BigInt('2');
var result = JSBI.add(max, other);
console.log(String(result));
// → '9007199254740993'

// compat extended API
console.log(JSBI.isBigInt(JSBI.BigInt('2')));
// → true