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  1. # is-string <sup>[![Version Badge][npm-version-svg]][package-url]</sup>
  2. [![github actions][actions-image]][actions-url]
  3. [![coverage][codecov-image]][codecov-url]
  4. [![dependency status][deps-svg]][deps-url]
  5. [![dev dependency status][dev-deps-svg]][dev-deps-url]
  6. [![License][license-image]][license-url]
  7. [![Downloads][downloads-image]][downloads-url]
  8. [![npm badge][npm-badge-png]][package-url]
  9. Is this value a JS String object or primitive? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
  10. ## Example
  11. ```js
  12. var isString = require('is-string');
  13. var assert = require('assert');
  14. assert.notOk(isString(undefined));
  15. assert.notOk(isString(null));
  16. assert.notOk(isString(false));
  17. assert.notOk(isString(true));
  18. assert.notOk(isString(function () {}));
  19. assert.notOk(isString([]));
  20. assert.notOk(isString({}));
  21. assert.notOk(isString(/a/g));
  22. assert.notOk(isString(new RegExp('a', 'g')));
  23. assert.notOk(isString(new Date()));
  24. assert.notOk(isString(42));
  25. assert.notOk(isString(NaN));
  26. assert.notOk(isString(Infinity));
  27. assert.notOk(isString(new Number(42)));
  28. assert.ok(isString('foo'));
  29. assert.ok(isString(Object('foo')));
  30. ```
  31. ## Tests
  32. Simply clone the repo, `npm install`, and run `npm test`
  33. [package-url]: https://npmjs.org/package/is-string
  34. [npm-version-svg]: https://versionbadg.es/inspect-js/is-string.svg
  35. [deps-svg]: https://david-dm.org/inspect-js/is-string.svg
  36. [deps-url]: https://david-dm.org/inspect-js/is-string
  37. [dev-deps-svg]: https://david-dm.org/inspect-js/is-string/dev-status.svg
  38. [dev-deps-url]: https://david-dm.org/inspect-js/is-string#info=devDependencies
  39. [npm-badge-png]: https://nodei.co/npm/is-string.png?downloads=true&stars=true
  40. [license-image]: https://img.shields.io/npm/l/is-string.svg
  41. [license-url]: LICENSE
  42. [downloads-image]: https://img.shields.io/npm/dm/is-string.svg
  43. [downloads-url]: https://npm-stat.com/charts.html?package=is-string
  44. [codecov-image]: https://codecov.io/gh/inspect-js/is-string/branch/main/graphs/badge.svg
  45. [codecov-url]: https://app.codecov.io/gh/inspect-js/is-string/
  46. [actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/inspect-js/is-string
  47. [actions-url]: https://github.com/inspect-js/is-string/actions