is-callable
Is this JS value callable? Works with Functions and GeneratorFunctions, despite ES6 @@toStringTag.
Last updated a year ago by ljharb .
MIT · Repository · Bugs · Original npm · Tarball · package.json
$ cnpm install is-callable 
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Is this JS value callable? Works with Functions and GeneratorFunctions, despite ES6 @@toStringTag.

Example

var isCallable = require('is-callable');
var assert = require('assert');

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

assert.ok(isCallable(function () {}));
assert.ok(isCallable(function* () {}));
assert.ok(isCallable(x => x * x));

Tests

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

Current Tags

  • 1.1.4                                ...           latest (a year ago)

9 Versions

  • 1.1.4                                ...           a year ago
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  • 1.0.2                                ...           5 years ago
  • 1.0.0                                ...           5 years ago
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