Get the number of items of an array, characters of a string or properties of an object; undefined otherwise.

npm i @davebaol/length-of --save

var lengthOf = require('@davebaol/length-of');

lengthOf({a: 'a', b: 'b'});
//=> 2

lengthOf('length-of');
//=> 9

lengthOf(['foo', 'bar']);
//=> 2

lengthOf(123);
//=> undefined

Pull requests and stars are always welcome. For bugs and feature requests, please create an issue

Install dev dependencies.

npm i -d && npm test

MIT © Davide Sessi