is-string
DefinitelyTyped icon, indicating that this package has TypeScript declarations provided by the separate @types/is-string package

1.0.7 • Public • Published

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Is this value a JS String object or primitive? This module works cross-realm/iframe, and despite ES6 @@toStringTag.

Example

var isString = require('is-string');
var assert = require('assert');

assert.notOk(isString(undefined));
assert.notOk(isString(null));
assert.notOk(isString(false));
assert.notOk(isString(true));
assert.notOk(isString(function () {}));
assert.notOk(isString([]));
assert.notOk(isString({}));
assert.notOk(isString(/a/g));
assert.notOk(isString(new RegExp('a', 'g')));
assert.notOk(isString(new Date()));
assert.notOk(isString(42));
assert.notOk(isString(NaN));
assert.notOk(isString(Infinity));
assert.notOk(isString(new Number(42)));

assert.ok(isString('foo'));
assert.ok(isString(Object('foo')));

Tests

Simply clone the repo, npm install, and run npm test

Package Sidebar

Install

npm i is-string

Weekly Downloads

30,029,417

Version

1.0.7

License

MIT

Unpacked Size

19.1 kB

Total Files

10

Last publish

Collaborators

  • ljharb