classidious v0.0.3

Classidious

Minimal Container-based Dependency Injection.

Example

This example is an index.js that creates a Parent from parent.js that in turn needs a Child from 'child.js`.

index.js

import { Container } from 'classidious'
import { Parent } from './parent.js'

const parent = new Container('deps').get(Parent)

parent.js

import { Child } from './child.js'

export class Parent {
	# Note the name of this field is supplied to the Container constructor.
	static deps = [Child]
	#child

	constructor(child) {
		this.#child = child
	}
}

child.js

export class Child {

}

When testing Parent the Child dependency can be mocked by adding a alternative instance like this:

import { Container } from 'classidious'
import { Parent } from './parent.js'
import { Child } from './child.js'

# Use your favorite mocking library.
const mockedChild = ... 
const testedParent = new Container('deps', { [Child]: mockedChild }).get(Parent)