Table of Content
- 4 What is TypeScript?
- 5 What is TypeScript Used For?
- 6 What are the Different Types of TypeScript?
- Easily adding interactive behavior to web pages.
- Creating web and mobile apps.
- Building web servers and developing server applications.
- Speeding up the performance of the application.
- Developing front-end development as well as back-end development.
- Performing the data validation on the web browser itself rather than on the server.
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What is TypeScript?
What is TypeScript Used For?
TypeScript is used for:
- Quickly coding for all complex and large applications.
- Availing all the benefits of ES6 (ECMAScript 6), plus more productivity.
What are the Different Types of TypeScript?
Furthermore, below are some other types that are expressivity of TypeScript:
Any & Unknown
And if we talk about Unknown, it’s exactly similar to Any, but it will not allow you to do anything with it unless it’s explicitly type-checked.
Void is specifically used by developers when there is no value returned. Generally, it’s used for the return type of function that returns nothing.
If something is never going to happen, we can use Never as the return type. One such good example is an exception-throwing function.
Intersection & Union Types
This option allows the developers to easily create custom types as per the logic. Intersection types let you combine several basic types into one type.
Let’s say, we have custom type Employee which contact empl_fname:string and empl_fname:string. And you want to convert this type to this and that.
Union types allow you to type to take one of the various basic types.
For example, if developers pass a query that returns either result:string or undefined, we can definitely say that this type needs to be converted to this or that.
All of these sorts make sense when you think of them as spaces.
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Moreover, TypeScript is strongly-entered, or we can say that it supports static typing. This means static typing permits checking type accuracy at compile time.
TypeScript is nothing but a JS and some added features, that is, ES6 features. Therefore, many JS developers do not prefer to keep it in their targeted web browser, but the TS compiler can compile .ts files into ECMAScript.
Pros and Cons of TypeScript
|It supports strong static typing||TypeScript is not a true statically typed language.|
|Easily detect bugs at the compile stage||Supports enhanced code readability|
|With TypeScript, everything stays the way it was initially defined.||TypeScript typically requires code compilation at every phase|
|TypeScript codes are more self-expressive||Unit tests are no longer instant|
|Rich IDE support||Non-TS libraries require types|
|Interoperable: meaning that we can use it with other programming languages and embed it in web pages.||Many HTML editors support debugging, it is not as efficient as other editors like C/C++ editors. Also, as the browser doesn’t show any error, it is difficult for the developer to detect the problem.|
|Minimizes the code length||The continuous conversions take longer in the conversion of a number to an integer.|
let var1 = “Welcome to Albiorix”; var1 = 30; console.log(var1);
Here, we can see that var1 is a string, then becomes a number.
So, the output of the code becomes 10.
Now, we will convert the same code to TypeScript:
let var1: string = “Welcome to Albiorix”; var1 = 10; console.log(var1);
Likewise, var1 is declared to be a string. And we are trying to assign a number to var1. This is strictly not allowed by TypeScript’s strict type system. Obviously, the transpiling results in an error:
TSError: ⨯ Unable to compile TypeScript: src/snippet1.ts:2:1 – error TS2322: Type ‘number’ is not assignable to type ‘string’.2 var1 = 10;
|Type||Strongly-typed object-oriented programming language||Light-weight, interpreted programming language|
|Creator||Anders Hejlsberg||Brendan Eich|
|Server Type||Client-side||Client-side and server-side|
|Best For||Developing large or complex applications||Developing small-sized applications|
|Learning curve||Steep learning curve||Easy to learn|
|Supports||Supports modules, generics, and interfaces||Does not support modules, generics, or interfaces|
|Prototyping||Prototyping feature is available||No support of Prototyping|
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You can opt for the TypeScript programming language when
- Large-Scale Projects: TypeScript is a programming language that is designed explicitly to develop large applications that run seamlessly or when many developers are working together.
- Easy to Use: If the developers are involved in React development and are not familiar with its APIs, you can utilize IntelliSense, which helps them identify and navigate new interfaces. However, they both offer type definitions.
- Active Framework Support: If TypeScript does not support any common framework like EmberJS, then the developers might not be able to leverage its features.