Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag. 

Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag

ljharb

is-regex

### Commits

- [actions] use `node/install` instead of `node/run`; use `codecov` action [`c681ab9`](https://github.com/inspect-js/is-regex/commit/c681ab99c07f8b3b7ae5f652b3105a30bce94f69)
- [Fix] do not use `Object.prototype.toString` when `Symbol.toStringTag` is shammed [`ca019fd`](https://github.com/inspect-js/is-regex/commit/ca019fdb828dc7d32e323213403ac9995d8604e3)
- [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `aud`, `tape` [`605a66f`](https://github.com/inspect-js/is-regex/commit/605a66f278900f1c8ae9d1dfcec31e5f61b10ad3)
- [readme] add actions and codecov badges [`8d7c6f0`](https://github.com/inspect-js/is-regex/commit/8d7c6f0e007bd982f21b958e0abc98b8a84e2a24)
- [meta] use `prepublishOnly` script for npm 7+ [`8e50e91`](https://github.com/inspect-js/is-regex/commit/8e50e91f51aa5038745526710ef2e030527982a7)
- [Deps] update `has-symbols` [`4742c81`](https://github.com/inspect-js/is-regex/commit/4742c81260c3db9a8c9ef57110981fb6175f58e0)

[v1.1.3](https://github.com/inspect-js/is-regex/compare/v1.1.2...v1.1.3) - 2021-05-07

### Commits

- [Performance] Re-add lastIndex check to improve performance [`d8495cd`](https://github.com/inspect-js/is-regex/commit/d8495cd22d475ddca250818921b6088f631c1972)
- [Dev Deps] update `auto-changelog`, `eslint` [`778fa6b`](https://github.com/inspect-js/is-regex/commit/778fa6b9d2b182ee6d73993e103532855e956f85)

[v1.1.1](https://github.com/inspect-js/is-regex/compare/v1.1.0...v1.1.1) - 2020-08-03

### Commits

- [New] use `badStringifier`‑based RegExp detection [`31eff67`](https://github.com/inspect-js/is-regex/commit/31eff673243d65c3d6c05848c0eb52f5380f1be3)
- [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `aud`, `tape` [`fc91458`](https://github.com/inspect-js/is-regex/commit/fc914588187b8bb00d8d792c84f06a6e15d883c1)
- [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `tape`; add `safe-publish-latest` [`d43ed83`](https://github.com/inspect-js/is-regex/commit/d43ed83db54ea727bb0b1b77a50af79d1edb8a6d)
- [Dev Deps] update `auto-changelog`, `tape`; add `aud` [`56647d1`](https://github.com/inspect-js/is-regex/commit/56647d196be34ef3c118ad67726e75169fbcb875)
- [meta] only run `aud` on prod deps [`e0865b8`](https://github.com/inspect-js/is-regex/commit/e0865b8360b0ac1b9d17b7b81ae5f339e5c9036b)

[v1.1.0](https://github.com/inspect-js/is-regex/compare/v1.0.5...v1.1.0) - 2020-06-03

### Commits

- Update npm run scripts. [`dc528dd`](https://github.com/inspect-js/is-regex/commit/dc528dd25e775089bc0a3f5a8f7ae7ffc4cdf52a)
- Add toStringTag tests. [`f48a83a`](https://github.com/inspect-js/is-regex/commit/f48a83a78720b78ab60ca586c16f6f3dbcfec825)
- If @@toStringTag is not present, use the old-school Object#toString test. [`50b0ffd`](https://github.com/inspect-js/is-regex/commit/50b0ffd9c7fdbd54aee8cde1b07e680ae84f6a0d)

[v1.0.3](https://github.com/inspect-js/is-regex/compare/v1.0.2...v1.0.3) - 2015-01-29

### Commits

- `make release` [`a1de7ec`](https://github.com/inspect-js/is-regex/commit/a1de7eca4cecc8015fd27804669f8fc61bd16a68)
- Improve optimization by separating the try/catch, and bailing out early when not typeof "object". [`5ab7632`](https://github.com/inspect-js/is-regex/commit/5ab76322a348487fa8b16761e83f6824c3c27d11)

[v1.0.2](https://github.com/inspect-js/is-regex/compare/v1.0.1...v1.0.2) - 2015-01-29

### Commits

- Using my standard jscs.json file [`1f1733a`](https://github.com/inspect-js/is-regex/commit/1f1733ac8433cdcceb25356f86b74136a4477cb9)
- Adding `npm run lint` [`51ea70f`](https://github.com/inspect-js/is-regex/commit/51ea70fa7e461d022f611c195f343ea8d0333d71)
- Use RegExp#exec to test if something is a regex, which works even with ES6 @@toStringTag. [`042c8c7`](https://github.com/inspect-js/is-regex/commit/042c8c734faade9015932b61f1e8ea4f3a93b1b3)
- Adding license and downloads badges [`366d619`](https://github.com/inspect-js/is-regex/commit/366d61965d3a4119126e78e09b2166bbcddd0c5a)
- Use SVG badges instead of PNG [`6a32e4f`](https://github.com/inspect-js/is-regex/commit/6a32e4fc87d7d3a3787b800dd033c9293aead6df)
- Update `tape`, `jscs` [`f1b9462`](https://github.com/inspect-js/is-regex/commit/f1b9462f86d1b69de07176e7f277f668757ba964)
- Update `jscs` [`1bff23f`](https://github.com/inspect-js/is-regex/commit/1bff23ff0fe88c8263e8bf04cf99e290af96d5b0)
- Update `tape`, `jscs` [`c22ea2e`](https://github.com/inspect-js/is-regex/commit/c22ea2e7967f45618deed01ff5ea483f918be216)
- Update `tape`, `jscs` [`b0479db`](https://github.com/inspect-js/is-regex/commit/b0479db99a1b1b872d1618fb0a71f0c74a78b29b)
- Use consistent quotes [`1a6e347`](https://github.com/inspect-js/is-regex/commit/1a6e34730d9270f3f20519139faa4c4e6ec2e1f5)
- Make travis builds faster. [`090a4ea`](https://github.com/inspect-js/is-regex/commit/090a4ea7c5fa709d108d596e3bc304e6ce973dec)
- Update `tape` [`7d76129`](https://github.com/inspect-js/is-regex/commit/7d7612928bdd43230fbd835db71797249ca24f35)
- Lock covert to v1.0.0. [`9a90b03`](https://github.com/inspect-js/is-regex/commit/9a90b03fb390e66f874223a34c58ba2bb109edd3)
- Updating tape [`bfbc7f5`](https://github.com/inspect-js/is-regex/commit/bfbc7f593a007acd0411152bbb55f724dc4ca935)
- Updating jscs [`13ad511`](https://github.com/inspect-js/is-regex/commit/13ad511d80cd67300c2c0c5387fc4b3b423e2768)
- Updating jscs [`cda1945`](https://github.com/inspect-js/is-regex/commit/cda1945d603dfe99e24d5a909a931d366451bc4d)
- Updating jscs [`de96c99`](https://github.com/inspect-js/is-regex/commit/de96c99d4bf5787df671de6df9138b6547a6545b)
- Running linter as part of tests [`2cb6567`](https://github.com/inspect-js/is-regex/commit/2cb656733b1ed0af14ad11fb584006d22de0c69d)
- Updating covert [`a56ae74`](https://github.com/inspect-js/is-regex/commit/a56ae74ec8d5f0473295a8b10519a18580f16624)
- Updating tape [`ffe47f7`](https://github.com/inspect-js/is-regex/commit/ffe47f7fe9cf6d16896b4bdc286bd1d0805d5c49)

1.1.4

1.1.3

v1.1.3 - 2021-05-07

Commits

1.1.2

1.1.1

v1.1.1 - 2020-08-03

Commits

1.1.0

v1.1.0 - 2020-06-03

Commits

1.0.5

1.0.4

1.0.3

v1.0.3 - 2015-01-29

Commits

1.0.2

v1.0.2 - 2015-01-29

Commits

1.0.1

v1.0.1 - 2015-01-28

Commits