Determine if a value is an ES6 Symbol or not.
Is this an ES6 Symbol value?
inspect-js
var isSymbol = require('is-symbol');
assert(!isSymbol(function () {}));
assert(!isSymbol(null));
assert(!isSymbol(function* () { yield 42; return Infinity; });
assert(isSymbol(Symbol.iterator));
assert(isSymbol(Symbol('foo')));
assert(isSymbol(Symbol.for('foo')));
assert(isSymbol(Object(Symbol('foo'))));Simply clone the repo, npm install, and run npm test
All notable changes to this project will be documented in this file.
The format is based on Keep a Changelog and this project adheres to Semantic Versioning.
9b9d06fcall-bind, has-symbols, safe-regex-test 07f3647call-bound directly 799402d@arethetypeswrong/cli, @ljharb/tsconfig 4b8b2f9398abaaacf85f0npmignore to autogenerate an npmignore file 77c818efor-each and es-value-fixtures 93dfed0ed6a0577f81ccccall-bind and safe-regex-test dc7e142eslint, @ljharb/eslint-config, aud, auto-changelog, object-inspect, tape 70f87c2eslint, @ljharb/eslint-config, object-inspect, safe-publish-latest, tape 3f02ff4@ljharb/eslint-config, auto-changelog, has-tostringtag, npmignore, object-inspect, tape 958887259e2f68e4759f8eslint, auto-changelog, object-inspect, tape 33990c0has-tostringtag for more robust Symbol.toStringTag detection d6154e1aud with npm audit 3215a6059f1a42has-symbols 06be1a9799b0da997d43cnode/install instead of node/run; use codecov action fe0ccb73ab2748f20fafenyc on all tests 5c332fceslint, @ljharb/eslint-config, aud, auto-changelog, object-inspect, tape c5a58a8bcd925833ae2d3eslint, @ljharb/eslint-config, aud, object-inspect, tape e53def0eslint, @ljharb/eslint-config, aud, auto-changelog, object-inspect ae36504aae7f09eslint, @ljharb/eslint-config, tape d993faeeslint, @ljharb/eslint-config, tape 51808a5auto-changelog, tape c90040feslint, tape 9fee159prepublishOnly script for npm 7+ b166afc4a0fe3afbcbc9eauto-changelog; add aud e66ab98has-symbols 6ce7de51173c79pull_request_target event 94a63480692681ed47833034afddjscs 0c026a0auto-changelog 9a1776bnode v12.10, v11.15, v10.16, v8.16, v6.17 23a6db4node v11.7, v10.15, v8.15, v6.16 892d92eeslint, @ljharb/eslint-config, safe-publish-latest, semver, tape c2e6d6a655c28897b122994c64a3eslint, @ljharb/eslint-config, covert, tape, semver 71ab543eslint, @ljharb/eslint-config, semver, tape c6212f9eslint, @ljharb/eslint-config, safe-publish-latest, object-inspect 91bc802npx aud instead of nsp or npm audit with hoops 8cbe69cnpm audit instead of nsp 741b51dfunding field 65b58d1has-symbols 9cb5b2aeslint, tape, semver; use my personal shared eslint config e86aaea50bc07ftape, jscs, nsp, semver, eslint, @ljharb/eslint-config 45e17bdnode v10.0, v9.11, v8.11, v6.14, v4.9; use nvm install-latest-npm 44402cbnode v8.1, v7.10, v6.11, v4.8; improve matrix; old npm breaks on newer nodes 9047c23tape, covert, jscs, semver d57d1cenpm run eslint 0d75a66eslint 042fb3ahas-symbols and object-inspect 129bc68node v10.11, v8.12 c1822e8tape, jscs, eslint, @ljharb/eslint-config 089d2cfnode v8.4; newer npm breaks on older node 05ce701node/iojs versions now ship with an npm that understands ^. 241e6a6node and io.js versions. 5c8d5deeslint, @ljharb/eslint-config, nsp, semver, tape 06047bfjscs, nsp, semver, eslint, @ljharb/eslint-config 9d25dd7io.js v3.3, node v4.1 ce173bdnsp, eslint 29e5214semver, eslint 53be884eslint, nsp, semver, tape 3bd149cjscs 69b4231io.js v2.1 0b61ac7tape 5e1b200a191ff5nsp, eslint, @ljharb/eslint-config 97c87efio.js v2.2 42560e4tape, eslint 149b2f228bd1edio.js v3.0 c0dcc98node now supports Symbols now. d1853adtape f7a6575aae9c6aio.js v2.4 ab8f449io.js v2.3 58ce871f4d15b9