is-api

Inspired by the is.js micro library, this is tiny javascript library that you can extend with your own type checking (and more) methods and benefit from the interfaces not, all and any the library provides with.

By default, the library is "naked". Use the extend() method to provide it with your own type checking methods.

Why?

Because I liked the idea to do my type checks using a more functional way, but I also wanted to include only the methods I needed at any project.

Install

npm

$ npm install --save is-api

GIT

$ git clone https://github.com/georapbox/is-api.git

Usage example

var is = require('is-api');

is.extend({
  'array': Array.isArray,
  'greaterThanFive': function (value) {
    return val > 5;
  }
});

// Check if a value is array
is.array([1, 2, 3]);
// -> true

is.array({foo: 'bar'});
// -> false

// Check if a value is NOT an array
is.not.array([1, 2, 3]);
// -> false

is.not.array({foo: 'bar'});
// -> true

// Check if all values are arrays
is.all.array([1, 2, 3], ['a', 'b', 'c']);
// -> true

is.all.array([1, 2, 3], 10);
// -> false

// Check if any of the values are arrays
is.any.array([1, 2, 3], 10);
// -> true

is.any.array(5, 10);
// -> false

// Check if a value is greater than 5
is.greaterThanFive(6);
// -> true

is.greaterThanFive(3);
// -> false

is.not.greaterThanFive(6);
// -> false

is.not.greaterThanFive(3);
// -> true

is.any.greaterThanFive(3, 7);
// -> true

is.any.greaterThanFive(2, 5, 4);
// -> false

is.all.greaterThanFive(6, 10, 45);
// -> true

No Conflict

When the library is used in a normal browser global namespace environment, you can use noConflict() method which returns the current API instance to you in order not to pollute your global namespace.

var utils = {};

utils.is = is.noConflict();

utils.is.extend({...});

License

The MIT License (MIT)