Mastering TypeScript 3 - Third Edition

Using dependency injection

Now that we are injecting property functions through our ConstructorInjector decorator, we can use our dependency injector framework as follows:

import GMailServiceDi from './app/GMailServiceDi'; 
import { ServiceLocatorGeneric } from './app/ServiceLocator'; 
import { IISystemSettings } from './app/ISystemSettings'; 
 
ServiceLocatorGeneric.register(IISystemSettings, { 
    SmtpServerConnectionString : 'smtp://localhost:1025', 
    SmtpFromAddress : '[e-mail]' 
}); 
 
var gmailDi = new GMailServiceDi(); 
 
gmailDi.sendMail("[e-mail]", "testsubject", "testContent"  
).then( (msg) => { 
    console.log(`sendMail returned : ${msg}`); 
} ).catch( (err) => { 
    console.log(`sendMail returned : ${err}`); 
}); 

After importing the various ...