First up, we will start off with TypeScript.
TypeScript – What and How?
What Exactly is TypeScript?
TypeScript has the following features:
Why Should We Use TypeScript?
TypeScript has the following advantages:
- Classes, interfaces, inheritance, and other Object-Oriented Programming concepts are supported by TypeScript.
The three components of TypeScript are as follows:
- Language is made up of syntax, keywords, and type annotations.
- The TypeScript Language Service adds an extra layer of editor-like apps surrounding the basic compiler process. The language service enables the standard set of editor functions such as statement completion, signature assistance, code formatting, and outlining, colorization, etc.
Environment Setup of TypeScript
We have already built up TypeScript programming online to run all of the accessible examples online at the same time as we work on our theory. This provides our trust in what we’re reading and allows us to test the results with other alternatives. Feel free to edit any of the examples and run them online.
var message:string = "Hello Everyone" console.log(message)
var message = "Hello Everyone"; console.log(message);
We’ll go over how to install TypeScript on the Windows platform. We’ll also show us how to set up the Brackets IDE.
We may use Playground to test the following example:
var num:number = 14 console.log(num)
var num = 14; console.log(num);
Setup of the Local Environment in TypeScript
Setup of the Local Environment: It can operate on any browser, host, and operating system. To create and test a Typescript application, we will need the following tools:
A text editor assists us in writing our source code. Some editors are Windows Notepad, Notepad++, Emacs, vim or vi, and so on. The editors used may differ depending on the operating system.
The source files are usually labeled with the extension ‘.ts’.
Installing TypeScript and Node on Windows
To install Node.js in a Windows environment, follow the instructions outlined below.
- Step 1: Download and execute the Node .msi installer.
- Step 2: In the terminal window, type node –v to see if the installation was successful.
- Step 3: In the terminal window, type the following command to install TypeScript.
npm install -g typescript
IDEs that Support TypeScript
Typescript may be created in various development environments, including Visual Studio, Sublime Text 2, WebStorm/PHPStorm, Eclipse, Brackets, and others. Visual Studio Code is the development environment utilized here (Windows platform).
Visual Studio Code
Visual Studio Code is an open-source IDE from Microsoft. It is accessible for Linux, Windows, and Mac OS X. VScode can be found at https://code.visualstudio.com/.
- Step 1: Download Visual Studio Code for Windows from the VS Code website.
- Step 2: To begin the setup process, double-click on ‘VSCodeSetup.exe’ Launch Setup Process. It will just take a minute to do this task.
- Step 3: We can directly navigate the file’s path by right-clicking on the file and selecting the open in command prompt. The Reveal in Explorer option, on the other hand, displays the file in the File Explorer.
Types in TypeScript
The Type System represents the many sorts of values that the language supports. Before the software stores or manipulates the provided values, the Type System validates them. This guarantees that the code works as it should. The Type System also enables greater code hinting and automatic documentation.
Data types are provided by TypeScript as part of its optional Type System. The following data types are classified:
- Any type
- Built-in types
In TypeScript, any data type is the super type of all types. It refers to a dynamic type. When we use any type, we are opting out of type checking for a variable.
|Number||number||64-bit floating-point numbers with double precision. It is capable of representing both integers and fractions.|
|String||string||This symbol represents a series of Unicode characters.|
|Boolean||boolean||True and false logical values are defined.|
|Void||void||Non-returning functions are represented on function return types.|
|Null||null||Represents the deliberate absence of an object value.|
|Undefined||undefined||Indicates the value assigned to all uninitialized variables.|
Enumerations, classes, interfaces, arrays, and tuples are examples of user-defined types.
- Adding interactive functionality to websites
- With the press of a button, we may show or hide more information.
- When the mouse lingers over a button, it changes color.
- On the homepage, we may scroll through a picture carousel.
- Zooming in or out on a picture.
- A timer or countdown is shown on a website.
- Incorporating audio and video into a web page.
- Animated images are being displayed.
- Using a hamburger menu with a drop-down menu.
- Developing online and mobile apps
- Building web servers and server applications
- Game development
- Less server interaction: We may check user input before sending the page to the server, which reduces server interaction. This reduces server traffic, resulting in a reduced burden on our server.
- Immediate feedback to the visitors: This reduces server traffic, reducing our server’s burden. Visitors receive immediate feedback; they do not have to wait for a page reload to discover whether they have neglected to type something.
- Increased interactivity: Interactivity may be increased by creating interfaces that respond when the user hovers over them with a mouse or activates them with the keyboard.
The script tag requires two crucial attributes: