Do you know that TypeScript is considered a better programming language than JavaScript? Yes, it's true. Wondering Why? We’ll discuss this in complete detail today.

1. for Your Next Project
Over Javascript
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TypeScript

2. Do you know that TypeScript is considered a
better programming language than JavaScript?
Yes, it's true. Wondering Why? We’ll discuss this
in complete detail today.
Here’s the short answer to your question:
TypeScript is preferred over JavaScript
because of the former’s static typing,
interfaces, enums, and high-level tooling
support. These properties let you write better
code with effective IDE support, leading to
higher work productivity. TypeScript’s
advanced interfaces and generics let you create
more robust programs and catch coding errors
before the program runs.
By the end of this article, you
will be able to understand:
Why is TypeScript chosen over JavaScript?
What impact has TypeScript had to the
development community?
What are the major uses of TypeScript?

3. Reasons behind TypeScript’s rising
popularity.
This guide is useful for TypeScript development
company and developers providing TypeScript
development services.

4. What is TypeScript, and How is it
Related to JavaScript?
TypeScript is a programming language; it has
everything JavaScript has to offer and some
more. The relationship between these two
languages is only limited to the extent of
JavaScript's features and functionalities.
For instance, let’s take these two code scripts:
You got it right. There’s no difference between

5. the code scripts.the code scripts. However,
understand this: TypeScript can extend
JavaScript, and these extended instructions
written in TypeScript intend to be more explicit
about what sort of data is used in the codebase.
Here is the extra :string adds certainty to the
fact that the name will only be a string. This is
an annotation, which means with TypeScript,
you give the system the opportunity to verify
that the strings match with the instructions
given. You will need such a thing when the
number of variables in the code is hundreds,
and it's not easy to keep track of everyone.
This means you can now work on bigger
For instances, here’s an extended version of the
same code written above:

6. projects than what JavaScript covers, which is
why TypeScript’s tagline reads, “JavaScript that
Scales.”
With TypeScript, you can verify the written
code upfront and verify its correctness. As a
result, the constant need to authenticate how
every change in the code affects the rest of the
program simply vanishes.
One of the reasons I think TypeScript should be
preferred is the evolution of the websites and
applications we build today. 10 to 20 years ago,
using JavaScript for development was fine
because the scale and size of the projects
weren’t that big and its usage was limited to
building the front-end of digital solutions.
times have changed now. JavaScript is used
almost everywhere, and the scale of solutions
we build today is complex and difficult to
understand. Hence, adding Types to the code
significantly reduces complexity.

7. TypeScript Syntax and its Examples
TypeScript syntax is similar to JavaScript; this
much we have already established. The pivotal
additions in TypeScript are the types, which can
be declared for variables, functions, and objects.
To clearly establish why you should use
TypeScript, let me take you through the syntax
examples:
1.) TypeScript Variables
These variables are the foundation of a
programming language, and in TypeScript, you
can add explicit and implicit variables. Their
utility depends on the function you want to run.
Implicit variables

8. 2.) TypeScript Functions
With functions, you can type both arguments
(passed and return), or you have the option to
skip adding the return value, as it’s implicitly
worked out most of the time.
But for a return argument, you will always need
to add it separately. Here’s an example:
3.) TypeScript Objects
Objects form a fundamental part of the
TypeScript codebase; hence, it is essential to
type them correctly. You have two ways of

9. adding Objects to the TypeScript code: Implicit
and Explicit. In the implicit route, you use the
properties defined on the object, and the other
route, you use index types.
But, in my experience, using the implicit route is
better as it provides more accuracy and better
auto-completion.
With this code, you can see that properties are
available on the object and given data types.
The other way to do this is to type every
possible property (as shown in the code below),
which is going to be time-consuming.

10. 4.) TypeScript Features
TypeScript Type Guards
Type guards prevent you from doing something
that the TypeScript variable doesn’t allow.
Often, this leads to moments when you need to
guard the statements and allow them to be
performed with certainty.

11. In addition to the function used to describe a value
in the example above, other ways to use type guards
are:
instanceof
1.
typeof
2.
type predicates
3.
TypeScript Interfaces
Interfaces present another way to type objects and
their values in TypeScript. However, instead of
writing them inline, we can define them
independently. This allows the interfaces to be
reused in multiple places.

12. Unions and Intersection
In the event of an extension of interfaces,
unions and intersections are used to combine
them and create a larger type. Here’s how they
work:
Union: A type union can specify if a value is
related to one or multiple types. And it also
depends whether you want to use a type guard
to define the value, the correct tuple, and
handle all its possibilities.
string[] | string | undefined - We have used this
above to showcase a union denoted by |.
Combining them with interfaces, you can run
the following code script:

13. 5. TypeScript Enums
Enums let us define a set of named constraints
to use throughout the code to ensure
consistency. This is how they work:
Intersections: Unions instruct what happens
when we set the type of value. But intersections
help you define an object’s type. Hence, we can
use intersections to combine multiple types
into one and here’s how to do it:

14. In this, we have defined enum as the type of
argument within the function to limit the
acceptance of values into a function. So, any
other value, including the ones that match the
enum, will be erroneous.
6. TypeScript Generics
Generics are an advanced feature of TypeScript
and are used to grant reusability to a function
that otherwise may have a single purpose.
Here’s an example of how we can use generics:
For a function tasked with fetching data from an
API without using generics, the data fetched can
be rendered unknown, making the use of
TypeScript redundant. However, when using

15. generics, you can convert a fetcher function to
accept a generate and instruct TypeScript to
validate the returned value from the fetch
function.
Here’s the code script to implement this:
Reasons why TypeScript is Better for
your Next Project
In short, I’ll give all the reasons you must
hire a trusted TypeScript development
company for your next project.
1. Less Chances of Project Failure: With
TypeScript, you can ensure that no wrong

16. type of argument of a function is passed on,
thereby preventing project errors and failure
early on.
2. Self-Documentation Capabilities: Coding in
TypeScript is self-explanatory, as the type
definitions are sent straight in the project or to
the library files.
3. TypeScript has Impressive IDE support:
Developers spend a lot of time working with IDEs.
Specifically, it can do the following:
Mouse Hover Support: Hover the mouse over
the code to check what activity it will provide.
Auto-Completion of Code: For static
programming languages, code auto-
completion is quicker and more reliable.
Type Checking (Real-Time): With TypeScript,
the IDE warns you whether it's possible to
access a function that doesn’t exist in
TypeScript.
Easier Code Refactor: Refactoring TypeScript
code in an IDE is easier than refactoring
JavaScript code. A mistake in variable naming
in JavaScript can cause refactoring failure.

17. 4. Type Inference: TypeScript is a statically typed
language and for other similar languages, you
may need to type in a lot of code. This is for
describing all the variables, functions, function
return types, etc. However, TypeScript has an
Inference feature that can estimate a variable’s
type tied to the value you have given.
5. Detect Errors: TypeScript adds better syntax
to JavaScript, which makes code compilation
easier. The compiler uses the syntax to identify
possible code errors before they happen, which
eases your work. A study even proved that
TypeScript can detect over 15% of JavaScript
bugs.
6. Object Orientation Capability: TypeScript
supports object-oriented programming concepts,
including;
Classes
Encapsulation
Inheritance
Abstraction
Interfaces
The OOP capability streamlines well-organized

18. code creation while ensuring that it is scalable
and maintainable. This is particularly helpful
when the project is large and full of complexities.
7. Better Knowledge Sharing: For a TypeScript
app development services company, knowledge
sharing among developers has a high impact on
work productivity. With TypeScript, it's easier for
the developers to share knowledge, as they can
add comments in every line.
You can use this feature to provide training,
lessons, and experiences for future use.
Moreover, this facilitates quick and easy
collaboration among developers.
8. Loved by Major Frameworks: Market’s leading
frameworks like React, Vue, and Angular, among
others, have built-in TypeScript. This means they
support TypeScript by default.
That’s not all; TypeScript also works seamlessly
on all sorts of browsers. TypeScript takes care of
compiling the code to JavaScript and then on
browsers.

19. To Sum it up,
TypeScript is a statically typed object-oriented
programming language, termed as a superset of
JavaScript. This essentially means that
TypeScript is better than JavaScript on various
levels. Developers who want to be fast, efficient,
and productive in their work often adopt
TypeScript due to its several capabilities and
syntaxical benefits.
A developer-friendly programming language,
TypeScript has several advantages, facilitating
development of complex applications and web
solutions.
We are a top TypeScript development company,
offering our services to businesses of all levels
and industries. Our in-house TypeScript experts
are here to guide you through consultation and
explain its implementation.
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