🪴 TJ's Notes 1.0

JavaScript Introduction

2 min read

What, Who, Why?

What is JavaScript?

JavaScript is a high-level, dynamic programming language used primarily for:

  • Creating interactive webpages
  • Server-side development
  • Building applications
  • Scripting

Who Created It?

JavaScript was created by Brendan Eich while working at Netscape Communications in 1995. It is written in c and c++ mostly for the netscape part

Why Use JavaScript?

JavaScript was designed to enhance the interactivity and creativity of web pages, making them more dynamic and engaging for users.

Other Details

Key Features

  • Event-Driven: JavaScript is inherently event-driven, making it ideal for creating interactive web applications where user actions trigger events.
  • Asynchronous Programming: JavaScript supports asynchronous programming through callbacks, Promises, and async/await, allowing non-blocking operations such as network requests.
  • Prototypal Inheritance: JavaScript uses prototypal inheritance rather than classical inheritance, allowing objects to inherit directly from other objects.
  • Front-End: Popular libraries and frameworks include React.js, Angular, and Vue.js, which simplify the development of complex user interfaces.
  • Back-End: Node.js enables JavaScript to be used for server-side development, with frameworks like Express.js facilitating the creation of web servers and APIs.
  • Full-Stack: JavaScript can be used across the entire development stack, with tools and frameworks such as Next.js and Nuxt.js supporting full-stack development.

Ecosystem and Tools

  • Package Managers: npm (Node Package Manager) and Yarn are commonly used to manage libraries and dependencies.
  • Build Tools: Tools like Webpack, Babel, and Vite help in optimizing and transpiling JavaScript code for various environments.

Browser Compatibility

  • Cross-Browser Support: Modern JavaScript engines in browsers like Chrome (V8), Firefox (SpiderMonkey), Safari (JavaScriptCore), and Edge (Chakra or V8) ensure that JavaScript code runs consistently across different browsers.

Security Considerations

  • Cross-Site Scripting (XSS): JavaScript can be a vector for security vulnerabilities like XSS if not handled properly. Developers must use techniques like input sanitization and Content Security Policy (CSP) to mitigate risks.

Community and Resources

  • Active Community: JavaScript has a vibrant community with extensive resources, including documentation, tutorials, forums, and conferences.
  • Learning Platforms: Many online platforms, such as MDN Web Docs, freeCodeCamp, and Codecademy, offer tutorials and courses for learning JavaScript.

Proceed to JavaScript Basic Programming

References

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  • date: 2024.08.15
  • time: 11:18

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