JS vs TS

Javascript and Typescript are both programming languages, but Typescript is a superset of Javascript, meaning that it extends features from Javascript and adds additional features of its own into the language.

Key Differences

Difference Javascript Typescript
Static Typing It is a dynamically typed language, meaning that variable types are determined at runtime. You don't need to explicitly declare the type of a variable. It introduces static typing, allowing developers to declare the types of variables, function parameters, and return types. This helps catch type-related errors during development rather than at runtime.
Compilation It is an interpreted language, and the code is executed by the browser's JavaScript engine directly. It needs to be transpiled into JavaScript before it can be executed. The TypeScript compiler translates TypeScript code into standard JavaScript, allowing it to run on any JavaScript runtime.
Language Features It has a basic set of features suitable for web development. It extends JavaScript by adding features such as static typing, interfaces, enums, and advanced support for object-oriented programming concepts like classes.
Generic Support Javascript doesn't support Generic Type. Typescript support Generic Type.
Tooling and IDE Support It has less advanced tooling compared to TypeScript. IDEs (Integrated Development Environments) can provide suggestions and autocompletions, but they may not catch certain types of errors as effectively. It has strong tooling support. IDEs can provide more intelligent autocompletions, better error checking, and improved refactoring tools due to the additional information provided by static types.
 Compatibility Code written in JavaScript is compatible with all browsers and JavaScript runtimes. Since TypeScript code is transpiled into JavaScript, it is also compatible with all JavaScript environments. TypeScript code can be written in a way that aligns with ECMAScript standards.
 Optional Parameters Javascript doesn't support optional parameter. Typescript support optional parameter.
Project Size Well-suited for smaller projects and quick development Particularly beneficial for larger projects where static typing can help catch potential issues early and improve maintainability.
Code Execution Time Javascript code execute much faster than Typescript code Typescript code execute slower than Javascript code. Typescript code converted to javascript and then transpile into plain javascript code.
Learning Curve It is generally considered easier to learn due to its dynamic typing and simplicity. It has a steeper learning curve, especially for developers new to static typing. However, developers familiar with statically-typed languages may find it more natural.

Difference	Javascript	Typescript
Static Typing	It is a dynamically typed language, meaning that variable types are determined at runtime. You don't need to explicitly declare the type of a variable.	It introduces static typing, allowing developers to declare the types of variables, function parameters, and return types. This helps catch type-related errors during development rather than at runtime.
Compilation	It is an interpreted language, and the code is executed by the browser's JavaScript engine directly.	It needs to be transpiled into JavaScript before it can be executed. The TypeScript compiler translates TypeScript code into standard JavaScript, allowing it to run on any JavaScript runtime.
Language Features	It has a basic set of features suitable for web development.	It extends JavaScript by adding features such as static typing, interfaces, enums, and advanced support for object-oriented programming concepts like classes.
Generic Support	Javascript doesn't support Generic Type.	Typescript support Generic Type.
Tooling and IDE Support	It has less advanced tooling compared to TypeScript. IDEs (Integrated Development Environments) can provide suggestions and autocompletions, but they may not catch certain types of errors as effectively.	It has strong tooling support. IDEs can provide more intelligent autocompletions, better error checking, and improved refactoring tools due to the additional information provided by static types.
Compatibility	Code written in JavaScript is compatible with all browsers and JavaScript runtimes.	Since TypeScript code is transpiled into JavaScript, it is also compatible with all JavaScript environments. TypeScript code can be written in a way that aligns with ECMAScript standards.
Optional Parameters	Javascript doesn't support optional parameter.	Typescript support optional parameter.
Project Size	Well-suited for smaller projects and quick development	Particularly beneficial for larger projects where static typing can help catch potential issues early and improve maintainability.
Code Execution Time	Javascript code execute much faster than Typescript code	Typescript code execute slower than Javascript code. Typescript code converted to javascript and then transpile into plain javascript code.
Learning Curve	It is generally considered easier to learn due to its dynamic typing and simplicity.	It has a steeper learning curve, especially for developers new to static typing. However, developers familiar with statically-typed languages may find it more natural.

<-- Version

Let vs Const vs Var -->

JS vs TS

Key Differences

Difference Javascript Typescript
Static Typing It is a dynamically typed language, meaning that variable types are determined at runtime. You don't need to explicitly declare the type of a variable. It introduces static typing, allowing developers to declare the types of variables, function parameters, and return types. This helps catch type-related errors during development rather than at runtime.
Compilation It is an interpreted language, and the code is executed by the browser's JavaScript engine directly. It needs to be transpiled into JavaScript before it can be executed. The TypeScript compiler translates TypeScript code into standard JavaScript, allowing it to run on any JavaScript runtime.
Language Features It has a basic set of features suitable for web development. It extends JavaScript by adding features such as static typing, interfaces, enums, and advanced support for object-oriented programming concepts like classes.
Generic Support Javascript doesn't support Generic Type. Typescript support Generic Type.
Tooling and IDE Support It has less advanced tooling compared to TypeScript. IDEs (Integrated Development Environments) can provide suggestions and autocompletions, but they may not catch certain types of errors as effectively. It has strong tooling support. IDEs can provide more intelligent autocompletions, better error checking, and improved refactoring tools due to the additional information provided by static types.
 Compatibility Code written in JavaScript is compatible with all browsers and JavaScript runtimes. Since TypeScript code is transpiled into JavaScript, it is also compatible with all JavaScript environments. TypeScript code can be written in a way that aligns with ECMAScript standards.
 Optional Parameters Javascript doesn't support optional parameter. Typescript support optional parameter.
Project Size Well-suited for smaller projects and quick development Particularly beneficial for larger projects where static typing can help catch potential issues early and improve maintainability.
Code Execution Time Javascript code execute much faster than Typescript code Typescript code execute slower than Javascript code. Typescript code converted to javascript and then transpile into plain javascript code.
Learning Curve It is generally considered easier to learn due to its dynamic typing and simplicity. It has a steeper learning curve, especially for developers new to static typing. However, developers familiar with statically-typed languages may find it more natural.

Difference	Javascript	Typescript
Static Typing	It is a dynamically typed language, meaning that variable types are determined at runtime. You don't need to explicitly declare the type of a variable.	It introduces static typing, allowing developers to declare the types of variables, function parameters, and return types. This helps catch type-related errors during development rather than at runtime.
Compilation	It is an interpreted language, and the code is executed by the browser's JavaScript engine directly.	It needs to be transpiled into JavaScript before it can be executed. The TypeScript compiler translates TypeScript code into standard JavaScript, allowing it to run on any JavaScript runtime.
Language Features	It has a basic set of features suitable for web development.	It extends JavaScript by adding features such as static typing, interfaces, enums, and advanced support for object-oriented programming concepts like classes.
Generic Support	Javascript doesn't support Generic Type.	Typescript support Generic Type.
Tooling and IDE Support	It has less advanced tooling compared to TypeScript. IDEs (Integrated Development Environments) can provide suggestions and autocompletions, but they may not catch certain types of errors as effectively.	It has strong tooling support. IDEs can provide more intelligent autocompletions, better error checking, and improved refactoring tools due to the additional information provided by static types.
Compatibility	Code written in JavaScript is compatible with all browsers and JavaScript runtimes.	Since TypeScript code is transpiled into JavaScript, it is also compatible with all JavaScript environments. TypeScript code can be written in a way that aligns with ECMAScript standards.
Optional Parameters	Javascript doesn't support optional parameter.	Typescript support optional parameter.
Project Size	Well-suited for smaller projects and quick development	Particularly beneficial for larger projects where static typing can help catch potential issues early and improve maintainability.
Code Execution Time	Javascript code execute much faster than Typescript code	Typescript code execute slower than Javascript code. Typescript code converted to javascript and then transpile into plain javascript code.
Learning Curve	It is generally considered easier to learn due to its dynamic typing and simplicity.	It has a steeper learning curve, especially for developers new to static typing. However, developers familiar with statically-typed languages may find it more natural.

<-- Version

Let vs Const vs Var -->