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Top 7 Key Stages of Typescript for Web Development in 2022


Top 7 Key Stages of Typescript for Web Development in 2022

Typescript, a front-end programming language, is quickly gaining popularity among developers. Typescript addresses many of the shortcomings of JavaScript and retains all its benefits. Web design London companies are attracted to developers who can switch between JavaScript and TypeScript. Today in this article, we will explore7 key stages of Typescripts through the most important syntax.

What's Typescript?

·         Typescript is a typed subset of JavaScript that was created in 2012 by Microsoft to assist Javascript developers working on large-scale Javascript applications.

·         The Typescript was created to be a structuring tool for large codebases. It helps you avoid common errors that could slow you down.

·         Because the language is flexible and can be modified, it is easy for teams to collaborate on the same project.

·          It also produces readable code. A typescript is an excellent tool for debugging multiple developers on a project.

·         This language makes it easier to use Javascript skills better.

·         After you have compiled your code, all Typescript stuff is gone, and you can produce clean, cross-platform, safe Javascript code.

·         Typescript is interoperable and offers unique features such as static typing, interfaces, classes, and many more in web development 2022.

TypeScript vs. JavaScript:

Javascript is an efficient programming language that can create interactive web pages. It's not intended for complex applications. Typescript is a static scripting language that a superset Javascript. It is an additional layer to your JS code. Typescript is not meant to replace Javascript. It doesn't override existing behavior. It uses JavaScript’s existing behavior to fix its shortcomings and address common problems with the language.

These are the differences between Typescript and Javascript.

·         Typescript, an object-oriented programming language, is JavaScript, a scripting language that supports object-oriented programming.

·         TypeScript supports static typing; JavaScript does not.

·         TypeScript uses interfaces and types to describe data usage.

·         TypeScript interfaces are powerful tools for creating contracts in your code.

·         TypeScript allows you to specify optional parameters for functions that JavaScript doesn't support.

Why use Typescript?

·         Typescript has many benefits. Let's take a look at some of the benefits.

·         Typescript detects errors in JavaScript code sooner than others. Typescript can detect errors and bugs before they are detected at runtime. This will allow you to write reliable code and minimize the dangers of JavaScript.

·         Transpiling lets you generate ECMAScript, and you can choose which version of JavaScript to use. This allows you to write code that works with older browsers while still using the most recent tools.

·         Typescript supports JS libraries and API documentation, such as JQuery, BootStrapJS, and React. Using the tools, you already know is easy, so it doesn't take too much learning.

·         Typescript uses static typing to organize your code and improve object-oriented programming techniques. Typescript's static typing makes it easier to refactor code, as you can navigate to the function’s members.

·         Typescript makes use of NPM to access millions of trusted libraries. It's also much easier to learn Typescript because you don't need to create custom tools to access libraries.

·         Typoscript is simpler to maintain. It is easier to understand and use. With the built-in self-documentation, it is easier to find types and objects within your code.

·         Typescript makes it easy to use React and Angular as well as Vue. Typescript works well with these frameworks, especially React, which is described as an excellent fit for Typescript. Although Typescript isn't required for these frameworks, it can be added to productivity and ease.


Top 7 Key Stages of Typescript for Web Development in 2022:

We'll help you get started with Typescript as soon as you've mastered the basics.

Step 1 - Setting up Typescript:

Install TypeScript:

Typescript can be accessed by installing TS Visual Studio Plugin or NPM (Node Package Manager).

To install TS, type the following command in the terminal after you have installed NPM.

npm installation -g typescript

So, you can run the following command in a shell to check which version you use.

TypeScript Compilers:

We use the command tscfilename.ts to compile TS code. This will create a JS file with the same name so we can later use it in the browser.

Step 2 - Exploring TypeScript types:


Typescript is a typescript program. Several web design London companies opting this seriously.  Typescript, the typed version of JS, allows us to specify types of variables as soon as they are declared. This makes your code more reliable and allows you to verify that it runs correctly before running.

Javascript has eight types. If you have worked with them before, you will know that they include string, number null undefined, object symbol begins, and boolean. Javascript is dynamically-typed. This means it doesn't know your variable's type until runtime, and variables can change their types. Sometimes bugs and errors can occur even if they are changed intentionally. Typescript solves this problem by adding static types into the code.

Typescript offers three types: any, built-in and user-defined.

·         Any type is a superset of all Typescript data types and is the most flexible. This means that variables can be of any type. This type will override any type checking if it is used.

·         Included types are number, string, and boolean.

·         The user can use the following types: interface, class, interface, enum, Array, and tuple

·         Let's take a closer look at each and show you how to use Typescript types.

Assigning Types:

Typescript requires a colon: to assign a type. The type name, equal sign =, and the value must be included. Let's take a look at an example.

let variable Name: typescript Type = value;


Typescript can represent decimal, binary literal, and hexadecimal numbers. Typescript supports floating-point values for all numbers.

Let num = 0.444

let hex: number = 0xbeef;

let bin: number = 0b0010;


Boolean values work exactly like Javascript.

Let's say yes to boolean: true

Let no: boolean = false


Typescript defines arrays as a collection of the same object. There are two options for declaring a typed array: using the datatype followed with [ ] or the generic array approach using Array.

Operator or create a multidimensional array to save one Array into another array using the [ ] operator.

string [])[] = [new Date(), new Date(), ["1", "a"]];


Although tuples are similar to arrays, we can specify the data stored at each location. You can create organized arrays with multiple types. An array can be expressed if you know its type and order.

Let number Tuple: [number. Number. Number]


Void is a subtype for undefined. It's a return type that can substitute with other types when necessary. When returning functions, a void is used. This tells us that a function will not return undefined. This guarantees that a function will not return a value.


Enums enable us to define a list of predefined constants. These constants can be defined using the enum keyword. A string or numeric enum can be defined.

enum MyStringEnum

choice = "A",

choice = "B"


Typescript uses the same syntax as Javascript but with double quotes or single quotations around the text. You can use the $expression or the backtick character to enable evaluated operations within a string.

Step 3 - Basics of variables:

Variables are used to store values in programming languages like TS. You can use var, let, and const to define variables in TS. There are some problems when using var. A variable declared using var within a function can be function-scoped but global-scoped if declared outside of a function. This could lead to problems in JavaScript code.

This problem can be solved by using the keyword let to set the variable's lifetime at the block it was declared. Const is a similar solution to let. However, it can only be initialized once it has been declared. Typescript will ensure that no value can ever be set.

Typescript variables follow the same syntax rules as other programming languages.

·         They can contain both lowercase and uppercase letters from the alphabet

·         They cannot start with a digit

·         These characters can contain special characters such as @ or $.


Step 4 - Commenting in TypeScript:

Comments in TS follow the same syntax that Javascript. Double slash is for single-line comments. Slash stars to open a bloc of comments. Star slash closes a block.

Typescript introduces a unique syntax. Typescript will preserve the comment when you add /*! This allows you to retain copyright at the top of a TS file which must be generated in JS.

Let x = 1 // This is one-line comment

/* This can also be spread on


lines */

let y = 2;

Step 5 - Type Inference:

The compiler uses type inference to determine the types. It can figure out types by their values. This means you don't need to define your types in code. Typescript has a powerful feature that allows you to manipulate types and combine them.

These are some examples of how Typescript's inference features can be used to infer types:

·         Variables must be declared and initialized

·         If default values are used as parameters

·         Determine the function return types

Step 6 – Functions:

Typescript doesn't make major changes to JavaScript’s function-scoped core. Typescript can enhance functions by providing strong signatures that allow us to define parameters or return types.

The function keyword is used to demonstrate a function. You can use the fat arrow to make a function that does not require the keyword. Typescript does not alter this. Typescript can be used for function arguments. We use a colon to do so.

Typescript functions can be classified into one of two types: function declarations or function expressions. Function declarations are when a function cannot be assigned to a variable, while function expressions can be assigned to a variable.

Typescript allows you to specify the type and keyword of a function using this keyword. This is done by using the following: followed by a colon and followed by the type signature of the function.

7: Mapped Type:

This allows you to create a new type by modifying an existing one. You could, for example, have the existing interface retain all its members but make them optional or read-only. We would need to create an additional interface before the mapped type. This can cause issues in the code and pollute it.

Without the mapped type, each interface would need a separate function. Things can quickly get out of control. Thanks to Typescript's custom logic for a mapped type, we don't need to deal with these issues.

Typescript offers a variety of mapping functions: partial, nullable and pick, omit.

Final Words:

Hopefully, this is the best typescript tutorial for you. You now understand TypeScript and can see how it will improve the quality of your Javascript code. Now you are ready to learn more advanced concepts. This interactive and hands-on course takes you from a complete beginner to advanced concepts like manipulating objects and iterators. This course is a must-have for front-end developers who want to learn this language. Contact O2SOFT web design London company for better assistance.

Have fun learning.

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