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- In this video, I'm
gonna be briefly talking

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about what TypeScript is,
and then I'll be talking

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about how you can get the
most out of this course,

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as well as what this
course is actually going

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to teach you about TypeScript.

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So to get started just talking
about what TypeScript is,

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simply, TypeScript is
just normal JavaScript

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but with types added on top of it.

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And these types are just a way

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of you defining what your actual
code structure looks like.

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So what your variables are,

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are they strings, numbers,
objects, and so on.

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And this information allows
you to detect different bugs,

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gives you good auto complete,
and other nice features.

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The really important thing
to know about TypeScript

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is that your browser can't
actually run TypeScript.

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That's because browsers
can only run JavaScript.

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So in order to get your
browser to run TypeScript code,

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what happens is TypeScript
compiles all your TypeScript code

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down to JavaScript.

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That way you can actually run your code.

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And all that this process
does is remove all

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of the type information
that TypeScript uses.

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This also means that TypeScript

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is technically a super set of JavaScript.

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All that means is that
everything that is valid

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in JavaScript is valid in TypeScript.

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If you take a normal JavaScript file

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and change it to a TypeScript file,

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all of the code in that JavaScript's file

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is 100% valid TypeScript.

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You can actually use JavaScript
inside your TypeScript code

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and it's going to work just fine.

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TypeScript just adds additional
things on top of JavaScript,

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which this course is
going to cover in depth.

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Now, kind of speaking about
what this course covers,

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there's two different types

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of TypeScript developers out there.

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There are the people that use TypeScript.

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These are your normal developers

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creating web applications every day.

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And then there are people
that write code in TypeScript.

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And these may sound like the same thing

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but the people that actually write code

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in TypeScript are people that
are specifically creating

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like libraries for other developers to use

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that are written in TypeScript.

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These people that write in TypeScript,

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these library developers
need to understand TypeScript

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at an incredibly in-depth level

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and they need to know
some of the most niche

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and complex features
of TypeScript in order

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to write out the complex types
needed by these libraries.

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But in order to use TypeScript

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in a normal web developer
job, you don't actually need

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to know that crazy level
of in-depth TypeScript.

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So this course is not going to
teach you the skills you need

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to know to build out
libraries in TypeScript

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that are gonna be used by
millions of different developers.

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Instead, I'm gonna be teaching
you the skills you need

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to actually land a job as a web developer.

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And the reason for that
is because that skillset

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is much smaller, much easier to understand

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and honestly, if I teach you
everything there is to know

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about TypeScript, odds are
you're only going to use maybe 10

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to 20% of it.

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So I'll be wasting your
time by teaching you

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all those other concepts.

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Now, with that said, don't
think that this course

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is gonna be super small or a push over.

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It still has a lot of really
important information in it

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and these are the TypeScript
skills you need, like I said,

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to land a job as a TypeScript developer,

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which is really the most important thing.

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Now, in order to get the
most out of this course,

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I highly recommend going
through each video rather slowly

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and making sure you understand
every concept and go

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through different
exercises and practice each

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of the concepts as we
go because everything

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in this course builds upon
the previous concepts.

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So you need to have a good
foundation before you can move on

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to the later concepts in this course.

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Also, after you're done with
this course, it's structured

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in a way that's really
good for you to be able

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to come back to and actually reference

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when you're at your first job

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or if you're just trying to
build a project in TypeScript

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and you're confused on
how to do something,

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this course is structured
in a perfect way.

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You can just come back,

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find the video on the specific
topic you want, watch it.

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It'll be relatively quick

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and that'll give you the skills you need.

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So it's a really great
reference point for you instead

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of having to reference
something like documentation.

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Now, the last thing I
wanna say about this course

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is that you obviously need
to have a good understanding

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of JavaScript in order to
actually learn and use TypeScript.

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But the good news is is
that learning TypeScript

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is much easier than learning JavaScript.

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So hopefully, you're able to go

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through this course rather quickly

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and rather easily compared

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to the process of learning the entirety

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of JavaScript because that
is incredibly difficult.