The difference between Typescript and JavaScript

TypeScript and JavaScript are two of the most popular scripting languages in current project development, and we already know that TypeScript is a superset of JavaScript, but what's the difference between TypeScript and JavaScript? When choosing a language for development, how do you decide?

This article will take a closer look at the two languages, discuss the associations and differences between the two languages, and summarize the advantages of both languages.

A brief introduction to JavaScript and TypeScript JavaScript

JavaScript is a lightweight, explanatory scripting language that can be embedded in HTML pages and executed on the browser side, enabling rich interactivity on the browser side, bringing a smooth and varied user experience to the user.

JavaScript is Object-and event-driven and does not require a specific locale to run on a supported browser.

The JavaScript language has the following characteristics:

• JavaScript is a scripting language that does not need to be compiled and can be interpreted by a browser-by-line loading as long as it is embedded in HTML code.
• JavaScript is an object-based language that lets you create objects that use existing objects at the same time. However, Javascript does not support the inheritance and overloading capabilities of other object-oriented languages.
• JavaScript is simple in syntax and uses a weakly typed variable.
• The JavaScript language is more secure and is only executed on the browser side and does not access local hard disk data.
• The JavaScript language is dynamic in nature. JavaScript is event-driven and responds only to the actions of the user.
• JavaScript relies only on the browser, regardless of the operating system's factors. So JavaScript is a cross-platform language.
• JavaScript is well-compatible and can be used with other technologies, such as the Xml,rest API.

TypeScript

TypeScript is an object-oriented programming language developed and maintained by Microsoft. It is a superset of JavaScript, contains all the elements of JavaScript, can be loaded into JavaScript code to run, and extends the syntax of JavaScript.

TypeScript has the following characteristics:

• TypeScript is a Microsoft-launched open source language that uses the Apache licensing agreement
• TypeScript adds static types, classes, modules, interfaces, and type annotations
• TypeScript can be used to develop large-scale applications
• TypeScript easy to learn and easy to understand

The main differences between JavaScript and TypeScript

TypeScript can use all the code and coding concepts in JavaScript, and TypeScript is created to make JavaScript easier to develop. For example, TypeScript uses concepts such as type and interface to describe the data being used, which enables developers to quickly detect errors and debug applications

• TypeScript extends the JavaScript object model from the core language aspects and the molding aspects of class concepts.
• JavaScript code can work with TypeScript without any modifications, and you can use the compiler to convert the TypeScript code to JavaScript.
• TypeScript provides compile-time static type checking through type annotations.
• The data requirements in TypeScript are of a definite type and JavaScript is not required.
• TypeScript provides a default parameter value for the function.
• TypeScript introduces a "class" concept that is not in JavaScript.
• The concept of modules is introduced in TypeScript, which encapsulates declarations, data, functions, and classes in modules.

Advantages of TypeScript

Here's a list of notable advantages of TypeScript compared to JavaScript:

1. Static input

Static typing is a feature that can detect errors when a developer writes a script. Finding and fixing errors is an urgent need for today's development teams. With this feature, developers are allowed to write more robust code and maintain it to make the code better and clearer.

2. Large-scale development projects

Sometimes in order to improve development projects, you need to make small incremental changes to the codebase. These small changes can have serious and unintended consequences, so it is necessary to undo these changes. It is easy and quick to refactor notconsistent using the Typescript tool.

3. Better collaboration

When large projects are opened, there will be many developers, and the garbled and wrong machines will also increase. Type safety is a feature that detects errors during encoding, rather than detecting errors when compiling a project. This creates a more efficient coding and debugging process for the development team.

4. Stronger productivity

The Clean ECMAScript 6 code, auto-complete, and dynamic input can help improve developer productivity. These features also help the compiler create optimized code.

The advantages of JavaScript

There are some obvious advantages compared to typescript,javascript.

1. Popularity

The developer community of JavaScript is still huge and active, and it is easy to find a large number of mature development projects and available resources in the community.

2. Learning curve

As the JavaScript language developed earlier and matured, a large number of developers persisted in using their familiar scripting language JavaScript rather than learning TypeScript.

3. Local browser support

The TypeScript code needs to be compiled (output JavaScript code), which is an additional step when the TypeScript code executes.

4. No comment required

In order to take advantage of the TypeScript feature, developers need to constantly annotate their code, which can reduce the efficiency of the project.

5. Flexibility

Some developers prefer the flexibility of JavaScript.

How to choose

TypeScript is becoming a powerful tool for developing large-scale coding projects. Because the structure of its object-oriented programming language keeps the code clean, consistent, and simple to debug. It is therefore more appropriate to use TypeScript when dealing with large-scale development projects. If you have a relatively small coding project, it doesn't seem necessary to use TypeScript, just use flexible JavaScript.

The difference between Typescript and JavaScript