Top 50 Differences Between JavaScript and TypeScript | JavaScript Vs TypeScript

Javascript VS Typescript
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Difference between TypeScript and JavaScript: When it comes to front-end web development, JavaScript and TypeScript are two of the most popular programming languages used today. While JavaScript has been the go-to language for creating interactive web pages and adding dynamic features to web applications, TypeScript has gained significant traction as an extension of JavaScript that offers optional static typing, classes, and interfaces.

TypeScript vs Javascript: What’s The Difference?

In this article, we have explored the top 50 differences between TypeScript and JavaScript, often referred to as TypeScript vs JavaScript or JavaScript vs TypeScript, to help you choose the right language for your next web development project. From their syntax and data types to their performance and tooling support, we will cover everything you need to know about the difference between TypeScript and JavaScript.

Comparison of JavaScript and TypeScript

What is JavaScript?

JavaScript is a dynamic, high-level, interpreted programming language that is used to create interactive and dynamic web pages. It was developed by Netscape in 1995 and has since become one of the most widely used programming languages on the web. JavaScript allows web developers to add interactivity, animation, and dynamic content to web pages by manipulating the Document Object Model (DOM) and responding to user events. It is also used on the server-side through platforms such as Node.js to create web servers and other backend applications. JavaScript has a vast and active developer community, with numerous libraries and frameworks available for use.

What is TypeScript?

TypeScript is a free, open-source programming language developed and maintained by Microsoft. It is a superset of JavaScript, which means that any valid JavaScript code is also valid TypeScript code. TypeScript adds optional static typing, classes, interfaces, and other object-oriented features to JavaScript, making it more suitable for large-scale, complex applications. It provides developers with improved tooling and error-checking, which results in fewer bugs and better code quality. TypeScript code is compiled to JavaScript, which can then run on any modern browser or Node.js environment. TypeScript is becoming increasingly popular among web developers, particularly those working on larger applications.

Top 50 Differences Between JavaScript and TypeScript

S.No.JavaScriptTypeScript
1Dynamic typingStatic typing
2Weakly typedStrongly typed
3No compile-time type checkingCompile-time type checking
4Uses var to declare variablesUses let and const to declare variables
5No built-in support for modulesHas built-in support for modules
6No optional parametersHas optional parameters
7No parameter type annotationsHas parameter type annotations
8No return type annotationsHas return type annotations
9No private, protected, or public access modifiersHas private, protected, and public access modifiers
10No class-based inheritanceHas class-based inheritance
11No interface supportHas interface support
12No namespace supportHas namespace support
13No enum supportHas enum support
14No tuple supportHas tuple support
15No nullability checkingHas nullability checking
16No readonly propertiesHas readonly properties
17No abstract classesHas abstract classes
18No intersection typesHas intersection types
19No union typesHas union types
20No type aliasesHas type aliases
21No type guardsHas type guards
22No type inference for variablesHas type inference for variables
23No type inference for functionsHas type inference for functions
24No type inference for return valuesHas type inference for return values
25No type inference for object literalsHas type inference for object literals
26No type inference for array literalsHas type inference for array literals
27No optional chaining operatorHas optional chaining operator
28No nullish coalescing operatorHas nullish coalescing operator
29No non-null assertion operatorHas non-null assertion operator
30No default parameter valuesHas default parameter values
31No rest parametersHas rest parameters
32No spread operator for objectsHas spread operator for objects
33No spread operator for arraysHas spread operator for arrays
34No template literalsHas template literals
35No destructuring assignmentHas destructuring assignment
36No arrow functionsHas arrow functions
37No generatorsHas generators
38No async/awaitHas async/await
39No for/of loopHas for/of loop
40No array methods like map, filter, reduce, etc.Has array methods like map, filter, reduce, etc.
41No string methods like toUpperCase, toLowerCase, etc.Has string methods like toUpperCase, toLowerCase, etc.
42No number methods like toFixed, toPrecision, etc.Has number methods like toFixed, toPrecision, etc.
43No object methods like toString, hasOwnProperty, etc.Has object methods like toString, hasOwnProperty, etc.
44No Math object methods like random, max, min, etc.Has Math object methods like random,
45No support for decoratorsHas support for decorators
46No Date object methods like getFullYear, getMonth, etc.Has Date object methods like getFullYear, getMonth, etc.
47No RegExp object methods like exec, test, etc.Has RegExp object methods like exec, test, etc.
48No Error object properties like name, message, etc.Has Error object properties like name, message, etc.
49No global type definitionsHas global type definitions
50No strict modeHas strict mode

TypeScript Vs JavaScript | Conclusion

JavaScript and TypeScript are two of the most popular programming languages used in web development, with JavaScript being the more widely used and accessible language. Known for its dynamic and loosely-typed nature, JavaScript is easy to learn and widely supported, making it a popular choice for front-end development. On the other hand, TypeScript is a statically-typed language that offers additional features such as optional static typing, classes, and interfaces to improve code quality and reliability. With its ability to catch errors before runtime and improve code navigation, TypeScript is gaining popularity among developers. The choice between JavaScript and TypeScript ultimately depends on the needs of the project and the preferences of the developer.

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