di.libx.js example with plain JS

di-libx-example-JS.js

const di = require("di.libx.js").default;
const { DependencyInjector } = require("di.libx.js");

// Modules declaration:
class ModuleA {
	options = {
		power: 2,
	}
	constructor(helper) {
		this.helper = helper;
	}

	calc(input) {
		return this.helper.power(input, this.options.power);
	}
}
class ModuleB {
	constructor(moduleA) {
		this.moduleA = moduleA;
	}
	Run(input) {
		return this.moduleA.calc(input);
	}
}
class HelperModule {
	power(input, power) {
		return Math.pow(input, power);
	}

}
// Somewhere in main startup location the main modules are initiated and registered:
di.register('helper', new HelperModule());

// Initiate ModuleA with it's dependencies
di.register('moduleA', di.initiate(ModuleA));
// or alternatively manually inject the dependency and manually initiate the module:
/*
di.inject((helper: HelperModule)=>{
 di.register('moduleA', new ModuleA(helper));
});
*/

// Change injected module configuration:
di.inject((moduleA) => {
	moduleA.options.power = 3;
});
// Register a local scoped container that inherits from the main container. 
// All locally registered modules will be disposed once exited scope.
const subContainer = new DependencyInjector(di);
subContainer.register('moduleB', di.initiate(ModuleB));

// Main execution point:
subContainer.inject((moduleB) => {
	const result = moduleB.Run(10);
	console.log('Result: ', result);
}).then(() => {
	console.log('DONE!');
});