Inversifyjs: dynamic creation of singleton?

[acopalipsis]

Is it possible to implement only with DI?

export const app = new Container();

function provider( context: interfaces.Context ): any {
    let { name } = context.container.get<any>( Symbol.for( 'config' ) );

    return { name };
}

app.bind<any>( Symbol.for('config') ).toConstantValue( {name: "config"} );
app.bind<any>( Symbol.for('provider') ).toDyn( provider );

let a = app.get<any>( Symbol.for( 'provider' ) );
let b = app.get<any>( Symbol.for( 'provider' ) );

console.log( a === b ); // to be true!

[remojansen]

You can use toDynamicValue + inSingletonScope:

import { interfaces, Container } from "inversify";

interface Config {
    name: string;
}

let container = new Container();

function provider( context: interfaces.Context ): any {
    let { name } = context.container.get<any>( Symbol.for( 'config' ) );
    return { name };
}

container.bind<Config>(Symbol.for('config')).toConstantValue({ name: "config" });
container.bind<Config>(Symbol.for('provider')).toDynamicValue(provider).inSingletonScope(); // !!!

let a = container.get<Config>(Symbol.for('provider'));
let b = container.get<Config>(Symbol.for('provider'));

console.log(a === b); // to be true!

[acopalipsis]

If so, then I apologize! This is the first thing that occurred to me, but typescript auto-completion in phpstorm said that there is no such method...