Maintain a list of users and associated passwords in memory.Let’s create some (very bad) user registration functionality to flex our express/typescript muscles a bit. Our “Hello world” app is a nice achievement, but I think we can do more. Huzzah! (well, it’s a start!) Beyond “Hello World” We can now navigate to in a web browser and see our “hello world” app in all it’s glory! I know some will say that doing so is really bad, but we have all done it and I am sure we will all continue to do it.To restart at any time, enter `rs`Įxpress with Typescript! We can see nodemon is watching all our files for changes and launches our app using ts-node index.ts.
In nodejs, more specifically javascript, due to the nature of the language one can fluidly create new properties on objects. So lets look at a scenario where typescript will make your life a little more difficult, luckily there is a way to get around this problem and continue to enjoy using typescript. I won’t go over why you should use typescript, but there are a couple of situations which will make you think ‘Why did I decide to use Typescript? Arghh!!!' and even that is part of the experience. I believe we have all been in the above mentioned scenario, and that is of course the desired consequence of using typescript. This will undoubtedly push you to create more custom types. I mention tslint just because it will mark all your variables, the ones without an explicit type, as being implicitly typed to any and of course you will get a nice red underline in your IDE or editor. You definitely would have had to create just a few, especially if you are using tslint to check and lint your code. You might have defined several types for your models, or for your function arguments or return types. If you have ever used Express with Typescript you have surely defined new types for your application.
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