No BS TS #5 - Optionals in Typescript

Understanding optional parameters, fields and calls is critical to writing great Typescript. Let's dig in and have a look at all these flavors of optionals, plus optional chaining, the null coalescing operator, and the `!` operator.

00:00 Introduction
00:05 Starting coding
00:20 Optional parameters
02:36 Optional fields
04:53 Optional function calls
05:58 Outroduction

👉 What's my theme? Night Wolf [dark blue]
👉 What's that font? MonoLisa

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#typescript #NoBSTS

[UnknownEntity]

This is teaching me so much about not just Typescript but also JavaScript lol. Did not know about the optional chaining for functions, and a few episodes ago you taught me about the null coalescence operator. I'm being humbled by the minute here... there is so much to this language that I did not understand!

[insanityrodax]

Hahah. Didnt know you could do the same for callbacks.
Thanks.

[drewbird]

I had no idea you could use optional chaining on function calls like that! 🤯

[slatanek]

Very good content. Clear and concise explanation. Underrated IMO

[zckfytc]

I'm learning a lot of new things! 🙏 Thank you so much, Jack!

[TiagoSalemaG]

thumbs up for the ?. on the callback. Interesting stuff!

[francis_n]

Thanks for these videos Jack "Principle Skinner" Herrington. These videos are really helping me in my job as I adjust to TS codebase 👍🏾

[alex-desroches]

really good video format, I learn a lot quickly from them

[adampielach]

didn't know about this callback optional operator. Thanks! :)

[SabrinaDias]

Não conhecia o a chamada de função condicional muito 👏

[ToddDunning]

Wow, the first of all Jack's videos where I knew something already. Oh wait, that was just the parameter option :(

[techhguy]

Awesome Tutorial! I now know when to use optional and their use cases. I was only wondering how would I run the callback function on the addWithCallback function?

[codelul]

Amazing series, hope there’s a react one as well, with redux toolkit

[aaronherman]

It looks like this video is missing from the React/TypeScript playlist - do you think you can add it?

[jdratlif]

@4:34 Why did you use the question mark after user? Isn't user non-optional here.

[DedicatedManagers]

Why the dot on the function optional?
Callback?.()

Why not just
Callback?()

[TheStruders]

${extra ?? ""} is a bit cleaner

[koi]

waaaait does the ?.() exist in vainilla JS? what about ?.[]
I don't need to sleep I need answers!