The precise requirements and objectives of the project, as well as the preferences and knowledge of the development team, will all play a role in the choice of language.

Midway through the 1990s, Netscape Communications Corporation created JavaScript as a tool for making web sites more interactive. Brendan Eich of Netscape was initially responsible for its conception and implementation, and it swiftly established itself as the industry standard.

JavaScript is a popular, versatile programming language that is widely used for building web applications and is supported by all modern web browsers. It is a dynamically-typed language, which means that the data type of a variable is determined at runtime rather than at compile time. This can make JavaScript more flexible and easier to work with, but it can also make it more prone to errors if not used carefully.

A superset of JavaScript called TypeScript gives the language optional static typing. As a result, when a variable is declared, developers can specify its data type, and the TypeScript compiler will examine the code for type consistency. Large codebases can be easier to comprehend and manage as a result, and type-related problems may be easier to spot earlier in the development process. Because it can increase the dependability and scalability of their code, TypeScript is becoming more and more well-liked among developers.

In general, JavaScript is a good choice for projects that require a high degree of flexibility and require the code to run in a wide variety of environments, such as web browsers or servers. TypeScript is a good choice for projects that require a more structured and maintainable codebase, particularly for large projects with many contributors.

In the TypeScript example, the let keyword is used to declare a variable, and the : string syntax is used to specify that the variable has a data type of string. In JavaScript, the data type of the variable is not explicitly specified, and the var keyword is used to declare it.

JavaScript basic code example

// Declare and initialize a variable in JavaScript
var message = "Hello, World!";

// Print the value of the variable to the console
console.log(message);

The same code example in TypeScript

// Declare and initialize a variable in TypeScript
let message: string = "Hello, World!";

// Print the value of the variable to the console
console.log(message);

As you see, in the TypeScript example, the let keyword is used to declare a variable, and the : string syntax is used to specify that the variable has a data type of string. In JavaScript, the data type of the variable is not explicitly specified, and the var keyword is used to declare it.

Note that TypeScript code must be compiled before it can be run, whereas JavaScript code can be run directly in a web browser or on a server.