React Material UI Tutorial - 8 - Select

I didn't understand why below code was used?

setCountries(typeof value === "string" ? value.split(",") : value);

why not just this?
setCountries(value);

Many thanks. Great explanation.

Muito bom, Parabéns pelos seus vídeos.

Can someone tell me how the line executes?
typeof value === "string" ? value.split(",") : value
I didn't understand the execution. If I select option India, I get object as 0:"IN". Now it compares typeof value === string which is false. Now it assigns the second option value into countries. but how the value appends to the string array here? As far as I know to add new element into an array arr, we do setArr([...arr, value]); Why aren't we doing the same over here? What is the use of split(",") here?

How to make dropdown list sticky when i scroll up and down, it moves ?

your first option was india.. thanks

if i need treeselect, how to custom it,thanks

How will I work with onFocus event in select input? İt is not working with select input while working with others type of input.

Amazing job!

how to add search filter ???

how if select using optgroup?

How we can make this field searchable? please tell !!

Hello, Your tutorials are excellent.
I follow the same steps shown in the video, but in the console, logs country is printing twice.
What is the reason behind this?

Amazing job love your work. Why did you choose to go with TexField over Select component?

as long as typescript is not necessity to learn mui, it is better to use react in tutorial.

How to implement this in a react class component?

is there a way to make cascading select fields?

setCountries(typeof value === "string" ? value.split(",") : value);
Why giving value in else condition?

setCountries(typeof value === "string" && value.split(","));
Why we can't use this?

What is the difference between the Select component and the TextField field component used like this?

HI there , i want to a know how to set dynamic value in select button using map and fetch that data which is selected using event how could i can do this could you explain