WEBVTT

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Before we dive into the core features
of this widely used programming

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language, I want to briefly
summarize what JavaScript is all about.

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Javascript is weakly-typed,
object-oriented programming language,

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which means that you don't
have to explicitly define the type

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of the data that a variable holds.

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It can change during the run time as well.

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For example, if a variable
holds an integer, you don't

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have to say that it's an integer.

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It can be a generic variable.

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This provides great flexibility,
but it can also lead to errors.

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So you have to be a little bit careful.

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And for the definition of types,
you might have heard of TypeScript.

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We are not going into JavaScript
for this section since we should first

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focus on JavaScript and understand that
before we go into more advanced topics.

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So now let's talk a little bit
about the object-oriented part.

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This allows the data to be organized
into logical objects with properties

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and methods, which in turn makes the data
management more efficient and organized.

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Another important concept to be aware
of in JavaScript is the difference

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between primitive and reference
types, which we're going to discuss

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in great details during the next videos.

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I wanted to discuss this because
these topics often come up in interviews

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that involve JavaScript as well.

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Originally, JavaScript was designed
to run in web browsers, but

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its flexibility also also allowed it
to be used in other environments such

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as on a server or on your computer.

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Later in the course, in another section,
we'll also talk about NodeJS

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which can help you build web servers
and perform a wide range of tasks,

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from working with the files and databases
to listening to user events.

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And in that same section, we'll also cover
the core features of JavaScript and delve

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into some of the latest next generation
features that are supported by NodeJS

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so be prepared to see how versatile
and dynamic JavaScript can be,

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and we'll learn how to use its powers
to build amazing applications.

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Let's get started in the next video.

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See you there.