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Hello, everyone.

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So here we find ourselves in a brand new lessem.

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So you might think to ask, why are you talking about TypeScript in this course?

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And in fact, you remember back when we began and we were, well, editing the component components

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in our first project, we mentioned something about using TypeScript throughout the course, but you

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also were basically thinking, hmm, well, it seems like all we need is JavaScript for Angular.

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So what's with TypeScript and what else aren't you going to tell me?

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Right, so, of course, when we ask this question, well, first of all, I'm going to tell you everything,

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but the first answer is, TypeScript is the superset of JavaScript.

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If he didn't know that wow, just blew your mind, if you did know that, it's like, well, why did

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it take so long to tell me?

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But in other words, TypeScript offers us all of the features of JavaScript, as well as some additional

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features, for example, JavaScript allows for basic string no or object definitions, but we can't

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control them in the way that we can when we use typescript.

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So, for example, let's say you have a number variable in JavaScript, but you string or something

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else afterwards.

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And while you won't get an error but in typescript, you cannot do this because you will get an error

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while running before compiling.

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Remember that little example I showed you in the very first lesson?

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And the fact is that as you progress, it will allow more robust choices because your code is checked

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as soon as you write it.

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So where is the main benefit that typescript will offer us is minimizing the possibility of making mistakes

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by showing us these unexpected errors.

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So why don't we just use TypeScript?

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Well.

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The weird thing is, TypeScript doesn't work either because it's basically not a programming language.

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Therefore, TypeScript is compiled and eventually converted to JavaScript.

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And that's why it works so easily on browser's.

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So CROI is needed within this build process, and if you're going to ask me why CROI?

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Well, all right, because it's thanks to see Allai, this compilation process can be performed very

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quickly.

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And in the end our code is run as JavaScript in the browser.

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In fact, technically we can prepare Angular with JavaScript.

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But yeah, it's not necessarily correct and a logical approach because Angular was prepared with TypeScript

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and we already mentioned that TypeScript has more features in JavaScript anyway.

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Right.

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So that's why.

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And therefore we're going to be working with TypeScript throughout the course.

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Don't worry, you're actually already a lot more familiar with TypeScript than you think.

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We're going to cover it all.

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And as you continue, you're going to realize how much you actually know about TypeScript because of

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JavaScript.

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So briefly, the working logic of typescript like that before finishing out, then we're going to dive

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into typescript topics.

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So first we need to create its extension file to work with typescript.

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Then after writing our code in his file, will install TypeScript Trans Pilar, and that will.

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Compiler Cotes.

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So the compiled codes will then be converted to jazz extension files, so JavaScript and then they'll

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be able to run on the browser.

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So, yes, indeed, my friends, I hope that I gave you a sufficient answer to the question of why are

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we doing TypeScript?

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And now we can get into the typescript topics in the next lesson.

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I'll see you there.