be-type

be-type is based on ECMAScript2015+ proxy feature

Usage

yarn add be-type
npm install --save be-type

JavaScript:

import be from 'be-type';
be.function(()=>{}); // true

Custom type check:

//be.js
import be,{setBe} from 'be-type';
export default setBe({
    Negative:(value)=> be.Number(negative) && negative < 0
})
//other.js
import be from '../be.js';
be.Negative(-1); // true

API

Interface Rule:

If the first letter of the API is lowercase, then it refers to toString.call(value), the type returned by call.

be.function(()=>{}) equivalent toString.call(()=>{}) ==== "[object Function]"

be.generatorFunction(function* (){}) equivalent toString.call(function* (){}) ==== "[object GeneratorFunction]"

be.uint8Array(new Uint8Array()) equivalent toString.call(new Uint8Array()) ==== "[object Uint8Array]" etc..

if the first letter of the API is Uppercase, it means not toString.call(value), Custom type returned by call

Default built-in type check:

Interface	Spec
Function	plain function
Object	plain object
String	basic string
Number	basic number
Boolean	basic boolean
NaN	strict equality to `NaN`
Nil	`null` or `undefined`
Empty	none length
Infinity	strict equality to `Infinity`
Finite	basic number and not `NaN` or `Infinity`
Native	pristine native function
SafeInteger	based on Number.isSafeInteger
Integer	based on Number.isInteger
Element	HTML Element

License

unadlib/be-type

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