types

Easy and reliable type detection with ES6+ support.

Compatibility

Compatible with node 10+ (--experimental-modules flag) and browsers supporting es modules.

Importing

node.js with esm

import types from 'es-modules/distributed-systems/types/1.x/types.mjs';

node.js with npm

import types from '@distributed-systems/types';

API

Be aware that the different object types like Maps, Promises and so on are not detected as objects but as their respective type. If you need to detect them as objects please use the types.someObject() method instead of the types.object() method.

Explicitly test for a type.

types.array([]) // true

Get the type of some variable

types(/[a-z]+/gi) // regexp

Supported Types

• string
• number
• boolean
• array
• intArray
• floatArray
• object
• function
• symbol
• date
• regexp
• error
• undefined
• buffer
• null
• arrayBuffer
• map
• weakMap
• set
• weakSet
• dataView
• float32Array
• float64Array
• int8Array
• int16Array
• int32Array
• uInt8Array
• uInt16Array
• uInt32Array
• uInt8ClampedArray
• generator
• promise
• someObject

Object Types

Since many of the types defined by javascript are just special objects that also can be treated as normal objects ee-types has a bunch of methods that allow you to handle that correctly.

For example, Map is an object, or a custom class where you define a getter that returns a specific name for your object:

const X = class {
    get [Symbol.toStringTag]() {
        return 'AQL query';;
    }
};

console.log(Object.prototype.toString.call(new X()));
// prints: [object AQL Query]

Check for a classic object

types.object({}); // true
types.object(new Map()); // false

// be aware that if you are not explicitly testing
// for an object any object will be treated as one
types({}) // 'object'
types(new Map()) // 'object'

Check any type of object

types.someObject({}); // true
types.someObject(new Map()); // false
types(new Map()) // 'object'

Examples

var types = require('ee-types');


types.string('nope');                // true
types.strign(new String('yeah'));    // true


types(2) // number

types([]]) // array
types(new Array()]) // array
types(new Int8Array()]) // int8Array


types.promise(Promise.all()) // true