7 Awesome TypeScript Types You Should Know 

it is good until you are really need to have an object

The semantics of what the higher level types are defined as is relevant information.

Bc it’s and interface 😂 not and object…

Javascripters trying to understand object orientation.

It used to be that way. But people complained that it is confusing and convoluted to see the result of the union when a union of preexisting types is made, instead they wanted to see which types the union is made of.

​@@Netrole what hellll. i think would be pretty usefull show the type and your fields. Like: title: string; description: string; role: Role < { name: string, i id: number } >

it is useful in creating branded type

This question is kind of backwards. Why would you want to define it? If you can infer it, the types are done. Your code defined them. Manually defining is redundant extra work. There are cases where you might not want to infer them, but those are the ones you'd need reasons for, which is the opposite of your question.

Let’s assume there is a function that returns an array of some kind of ingredients. In useState you want to declare that you want to keep array of some ingredients, but you start with an empty array. How to type the useState without knowing the return type of that function if you don’t wave the type specified elsewhere? It looks like an edge case but I can see a need for it sometimes

​@@DavidWMiller no lol, declaring the return type is beneficial because a reader can see what the function returns without having to interpret the function.

​@@gnack420Typescript shows you the inferred type when hovering the function name. No need for reading the code

@@diegofernandocobacruz6508 The IDE does that, not TypeScript. Open it on a notepad and hover it over.

thats true one thing that can be done is "tsc --noEmit --incremental --watch" and that at least shows the errors in the console

It's just an example probably not the best one. But is super handy when you want to keep track of all keys within an Object or Enum

@@IneyeGabriel I know the feature is useful, but the example makes it more confusing

sorry but this is not a high quality comment

That Prettify type makes the video high quality

Like every developer finds a bug once in a while 😂