ljharb

is-bigint

All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)

and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [v1.0.3](https://github.com/inspect-js/is-bigint/compare/v1.0.2...v1.0.3) - 2021-08-06

- [Tests] use `has-tostringtag` for easier checking of Symbol.toStringTag [`3b44080`](https://github.com/inspect-js/is-bigint/commit/3b440801b69689d907b33184134f00d7e8a35f9f)

- [Dev Deps] update `auto-changelog`, `eslint`, `object-inspect`, `tape` [`e4d4a6c`](https://github.com/inspect-js/is-bigint/commit/e4d4a6c2ab743b52eda906abd1ed4b0608952533)

- [Fix] use `has-bigints` for more robust BigInt detection [`7bb9d7a`](https://github.com/inspect-js/is-bigint/commit/7bb9d7ab42214c12ce25e9f0cfe2af769388c3bb)

## [v1.0.2](https://github.com/inspect-js/is-bigint/compare/v1.0.1...v1.0.2) - 2021-05-04

- [meta] do not publish github action workflow files [`276d677`](https://github.com/inspect-js/is-bigint/commit/276d677d1eac61e990a2f2b523c7cdef70784865)

- [actions] use `node/install` instead of `node/run`; use `codecov` action [`cea7fb6`](https://github.com/inspect-js/is-bigint/commit/cea7fb6e882ad7e2f550de2bd9317a4409bcd735)

- [readme] fix repo URLs; remove travis badge [`c8e7c36`](https://github.com/inspect-js/is-bigint/commit/c8e7c3651f3303fddafa61cf29cfbb79ea2d5d4b)

- [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `aud`, `has-symbols`, `object-inspect`, `tape` [`32f3d90`](https://github.com/inspect-js/is-bigint/commit/32f3d909363045fe5d40dde9e4db354344ab4d50)

- [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `object-inspect`, `tape` [`c2f20f5`](https://github.com/inspect-js/is-bigint/commit/c2f20f577d84e68b4e3224abb51024fbc4b9b2ba)

- [meta] remove unneeded token; update checkout action [`94e46e9`](https://github.com/inspect-js/is-bigint/commit/94e46e92a1a85ec022c8febf8d5d3c2369b46e97)

- [meta] use `prepublishOnly` script for npm 7+ [`3e663ec`](https://github.com/inspect-js/is-bigint/commit/3e663ecb09bfdc5dbaaa37aaef4adf28b5e49035)

## [v1.0.1](https://github.com/inspect-js/is-bigint/compare/v1.0.0...v1.0.1) - 2020-11-30

- [Tests] use shared travis-ci configs [`28f1211`](https://github.com/inspect-js/is-bigint/commit/28f1211132ad2a6495d816140680fa16c12eb6f3)

- [Tests] migrate tests to Github Actions [`0998c64`](https://github.com/inspect-js/is-bigint/commit/0998c6443d603028f8b988bcdd52d23dbf513031)

- [meta] add `auto-changelog` [`2352de6`](https://github.com/inspect-js/is-bigint/commit/2352de6df8385b256d75ce50c360947243a599f6)

- [Tests] run `nyc` on all tests [`9c16a9a`](https://github.com/inspect-js/is-bigint/commit/9c16a9a5ddaf7c2c578542ab8f00dd4e72eff541)

- [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `auto-changelog`, `object-inspect`, `tape` [`4cd0edd`](https://github.com/inspect-js/is-bigint/commit/4cd0edd1917f789501291315c9eac5f895fd719e)

- [actions] add automatic rebasing / merge commit blocking [`f0f4b91`](https://github.com/inspect-js/is-bigint/commit/f0f4b91dba029dbca5b3cd27ef91c4fb8e3ec51a)

- [actions] add "Allow Edits" workflow [`7f4f46e`](https://github.com/inspect-js/is-bigint/commit/7f4f46ec07679c00e22287ec55b39ff1e4f809cf)

- [meta] create FUNDING.yml [`2d0cb9a`](https://github.com/inspect-js/is-bigint/commit/2d0cb9ae8ddf635f2c472ce49f95f717f2c432bf)

- [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `aud` [`0ee110e`](https://github.com/inspect-js/is-bigint/commit/0ee110effdcaa96d90f21a0ec6e625941f77c45a)

- [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `has-symbols`, `object-inspect`, `tape` [`5bb7f3a`](https://github.com/inspect-js/is-bigint/commit/5bb7f3a8de6ec5ee2aa573c22e41884f3d2d1cc3)

- [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `safe-publish-latest`, `tape` [`d3d67d0`](https://github.com/inspect-js/is-bigint/commit/d3d67d05f8a3f4cb07085811629f56ef872949c3)

- [Dev Deps] update `auto-changelog`, `tape` [`54e270f`](https://github.com/inspect-js/is-bigint/commit/54e270fa29856dba90f86785fa61bffc79a2825d)

- [Dev Deps] update `@ljharb/eslint-config`, `tape` [`d82bfe7`](https://github.com/inspect-js/is-bigint/commit/d82bfe75c63aeda40f7e473c57f26cea8790ba3a)

- [Dev Deps] update `auto-changelog`; add `aud` [`9c34bd1`](https://github.com/inspect-js/is-bigint/commit/9c34bd1873f08d77c82d8e54ad90c5a1a035e7ea)

- [Tests] add missing `posttest` script [`0690bd9`](https://github.com/inspect-js/is-bigint/commit/0690bd9868d4d8b43424b4224cdbb8659a1c6423)

- [meta] add `funding` field [`7ca36d0`](https://github.com/inspect-js/is-bigint/commit/7ca36d06ebcf6b01a592ecd6758bd2b39c0fb0db)

- [actions] switch Automatic Rebase workflow to `pull_request_target` event [`5ffa8da`](https://github.com/inspect-js/is-bigint/commit/5ffa8dad9f634891cf739ee118f1b43142b0f01d)

- [Dev Deps] update `eslint` [`8512c2f`](https://github.com/inspect-js/is-bigint/commit/8512c2f29a9267fe8fe19209bcf77df94f127172)

- [Tests] only audit prod deps [`f2147dc`](https://github.com/inspect-js/is-bigint/commit/f2147dc54e72594985e8f6db3932a4f0819dc4db)

- [readme] fix header [`d6eff75`](https://github.com/inspect-js/is-bigint/commit/d6eff75d00471f465768deb92867e878c27733b3)

- [Tests] add tests [`847f12a`](https://github.com/inspect-js/is-bigint/commit/847f12af125fcefb75ed3517550feedf7dd73e88)

- Initial commit [`b53f3c6`](https://github.com/inspect-js/is-bigint/commit/b53f3c6754e7fd7a9982ff5b1466c4dc9799dad9)

- readme [`66c15fe`](https://github.com/inspect-js/is-bigint/commit/66c15fe1a0d965b8c78bf3a3bfc289dcfec53ee1)

- Implementation [`c2c0974`](https://github.com/inspect-js/is-bigint/commit/c2c0974397825a2a56e1ea8af0546171309d4805)

- package.json [`98b174c`](https://github.com/inspect-js/is-bigint/commit/98b174c24b070053f0548e58f9b87bc9dbdf922a)

- Only apps should have lockfiles [`a77c74b`](https://github.com/inspect-js/is-bigint/commit/a77c74bd8ca5f058f1e6165ae7b33bb84adef98c)

var hasBigInts = require('has-bigints')();

	var bigIntValueOf = BigInt.prototype.valueOf;

	var tryBigInt = function tryBigIntObject(value) {

	module.exports = function isBigInt(value) {

	"description": "Is this value an ES BigInt?",

		"prepublishOnly": "safe-publish-latest",

		"prepublish": "not-in-publish || npm run prepublishOnly",

		"tests-only": "nyc tape 'test/**/*.js'",

		"version": "auto-changelog && git add CHANGELOG.md",

		"postversion": "auto-changelog && git add CHANGELOG.md && git commit --no-edit --amend && git tag -f \"v$(node -e \"console.log(require('./package.json').version)\")\""

		"url": "git+https://github.com/inspect-js/is-bigint.git"

	"author": "Jordan Harband <ljharb@gmail.com>",

		"url": "https://github.com/sponsors/ljharb"

		"url": "https://github.com/inspect-js/is-bigint/issues"

	"homepage": "https://github.com/inspect-js/is-bigint#readme",

var hasSymbols = require('has-symbols')();

var hasToStringTag = require('has-tostringtag/shams')();

var debug = function (v, m) { return inspect(v) + ' ' + m; };

var hasBigInts = typeof BigInt === 'function';

		nonBigInts.push(Symbol.iterator, Symbol('foo'));

	forEach(nonBigInts, function (nonBigInt) {

		t.equal(false, isBigInt(nonBigInt), debug(nonBigInt, 'is not a BigInt'));

test('faked BigInt values', function (t) {

	t.test('real BigInt valueOf', { skip: !hasBigInts }, function (st) {

		var fakeBigInt = { valueOf: function () { return BigInt(42); } };

		st.equal(false, isBigInt(fakeBigInt), 'object with valueOf returning a BigInt is not a BigInt');

	t.test('faked @@toStringTag', { skip: !hasBigInts || !hasSymbols || !Symbol.toStringTag }, function (st) {

	t.test('faked @@toStringTag', { skip: !hasBigInts || !hasToStringTag }, function (st) {

		fakeBigInt[Symbol.toStringTag] = 'BigInt';

		st.equal(false, isBigInt(fakeBigInt), 'object with fake BigInt @@toStringTag and valueOf returning a BigInt is not a BigInt');

		var notSoFakeBigInt = { valueOf: function () { return 42; } };

		notSoFakeBigInt[Symbol.toStringTag] = 'BigInt';

		st.equal(false, isBigInt(notSoFakeBigInt), 'object with fake BigInt @@toStringTag and valueOf not returning a BigInt is not a BigInt');

	var fakeBigIntString = { toString: function () { return '42n'; } };

	t.equal(false, isBigInt(fakeBigIntString), 'object with toString returning 42n is not a BigInt');

test('BigInt support', { skip: !hasBigInts }, function (t) {

		Function('return 42n')(), // eslint-disable-line no-new-func

		t.equal(true, isBigInt(bigInt), debug(bigInt, 'is a BigInt'));

		'use strict';

		if (typeof BigInt === 'function') {
		var hasBigInts = require('has-bigints')();

		if (hasBigInts) {
		var bigIntValueOf = BigInt.prototype.valueOf;
		@@ -5,0 +7,0 @@ var tryBigInt = function tryBigIntObject(value) {

		{
		"name": "is-bigint",
		"version": "1.0.2",
		"version": "1.0.3",
		"description": "Is this value an ES BigInt?",
		@@ -39,9 +39,10 @@ "main": "index.js",
		"aud": "^1.1.5",
		"auto-changelog": "^2.2.1",
		"eslint": "^7.25.0",
		"auto-changelog": "^2.3.0",
		"eslint": "^7.32.0",
		"has-bigints": "^1.0.1",
		"has-symbols": "^1.0.2",
		"nyc": "^10.3.2",
		"object-inspect": "^1.10.2",
		"object-inspect": "^1.11.0",
		"safe-publish-latest": "^1.1.4",
		"tape": "^5.2.2"
		"tape": "^5.3.0"
		},
		@@ -48,0 +49,0 @@ "auto-changelog": {

Improved metrics

Worsened metrics

		@@ -8,2 +8,10 @@ # Changelog

		## [v1.0.3](https://github.com/inspect-js/is-bigint/compare/v1.0.2...v1.0.3) - 2021-08-06

		### Commits

		- [Tests] use `has-tostringtag` for easier checking of Symbol.toStringTag [`3b44080`](https://github.com/inspect-js/is-bigint/commit/3b440801b69689d907b33184134f00d7e8a35f9f)
		- [Dev Deps] update `auto-changelog`, `eslint`, `object-inspect`, `tape` [`e4d4a6c`](https://github.com/inspect-js/is-bigint/commit/e4d4a6c2ab743b52eda906abd1ed4b0608952533)
		- [Fix] use `has-bigints` for more robust BigInt detection [`7bb9d7a`](https://github.com/inspect-js/is-bigint/commit/7bb9d7ab42214c12ce25e9f0cfe2af769388c3bb)

		## [v1.0.2](https://github.com/inspect-js/is-bigint/compare/v1.0.1...v1.0.2) - 2021-05-04
		@@ -10,0 +18,0 @@

		@@ -5,4 +5,8 @@ 'use strict';
		var inspect = require('object-inspect');
		var isBigInt = require('..');
		var hasBigInts = require('has-bigints')();
		var hasSymbols = require('has-symbols')();
		var hasToStringTag = require('has-tostringtag/shams')();

		var isBigInt = require('../');

		var debug = function (v, m) { return inspect(v) + ' ' + m; };
		@@ -17,5 +21,2 @@

		var hasSymbols = require('has-symbols')();
		var hasBigInts = typeof BigInt === 'function';

		test('non-BigInt values', function (t) {
		@@ -55,3 +56,3 @@ var nonBigInts = [

		t.test('faked @@toStringTag', { skip: !hasBigInts \|\| !hasSymbols \|\| !Symbol.toStringTag }, function (st) {
		t.test('faked @@toStringTag', { skip: !hasBigInts \|\| !hasToStringTag }, function (st) {
		var fakeBigInt = { valueOf: function () { return BigInt(42); } };
		@@ -58,0 +59,0 @@ fakeBigInt[Symbol.toStringTag] = 'BigInt';