@bemoje/assert-constructor

Throws TypeError if 'value' is not a constructor.

Version

Travis CI

Dependencies

Stats

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Installation

npm install @bemoje/assert-constructor
npm install --save @bemoje/assert-constructor
npm install --save-dev @bemoje/assert-constructor

Usage

import assertConstructor from '@bemoje/assert-constructor'

function constructorName(ctor) {
    assertConstructor(ctor)
    return ctor.name
}

constructorName(class MyClass {})
//=> 'MyClass

constructorName(function MyClass() {})
//=> 'MyClass

try {
    constructorName(() => {})
    //=> throw TypeError('Expected class constructor, got Function')
} catch (e) {
    console.log(e)
}

try {
    constructorName('asd')
    //=> throw TypeError('Expected class constructor, got String')
} catch (e) {
    console.log(e)
}

Tests

Uses Jest to test module functionality. Run tests to get coverage details.

npm run test

API

assertConstructor

Throws TypeError if 'value' is not a constructor.

Parameters

• value any The value to evaluate

Returns

void