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What is JavaScript? Basics ▼

JavaScript is a high-level, interpreted programming language that is one of the core technologies of the World Wide Web, alongside HTML and CSS.

Key Features:

  • Dynamic typing and first-class functions
  • Prototype-based object-orientation
  • Event-driven and asynchronous programming
  • Cross-platform compatibility

JavaScript enables interactive web pages and is an essential part of web applications. The vast majority of websites use it for client-side page behavior.

HTML & CSS Fundamentals Web Dev ▼

HTML (HyperText Markup Language)

HTML is the standard markup language for creating web pages. It describes the structure of a web page semantically and originally included cues for the appearance of the document.

CSS (Cascading Style Sheets)

CSS is a style sheet language used for describing the presentation of a document written in HTML. CSS describes how elements should be rendered on screen, on paper, in speech, or on other media.

  • Separation of content and presentation
  • Responsive design capabilities
  • Animations and transitions
  • Grid and Flexbox layouts
Modern Web Development Advanced ▼

Modern web development involves a vast ecosystem of tools, frameworks, and best practices that have evolved to handle the complexity of today's web applications.

Popular Frameworks & Libraries:

  • React: A JavaScript library for building user interfaces
  • Vue.js: Progressive framework for building UIs
  • Angular: Platform for building mobile and desktop web applications
  • Node.js: JavaScript runtime built on Chrome's V8 engine

Development Tools:

  • Version control with Git
  • Package managers (npm, yarn)
  • Build tools (Webpack, Vite)
  • Testing frameworks (Jest, Cypress)

The landscape is constantly evolving, with new tools and techniques emerging regularly to improve developer productivity and user experience.

Responsive Design Principles Design ▼

Responsive web design is an approach to web design that makes web pages render well on a variety of devices and window or screen sizes.

Core Concepts:

  • Fluid Grids: Use relative units like percentages instead of fixed pixels
  • Flexible Images: Images that scale appropriately within their containers
  • Media Queries: CSS techniques to apply different styles for different devices
  • Mobile-First Approach: Design for mobile devices first, then scale up

Benefits:

Responsive design provides an optimal viewing experience across a wide range of devices, reducing the need for separate mobile sites and improving SEO performance.

Web Accessibility (A11y) Important ▼

Web accessibility means that websites, tools, and technologies are designed and developed so that people with disabilities can use them.

Key Principles (POUR):

  • Perceivable: Information must be presentable to users in ways they can perceive
  • Operable: User interface components must be operable
  • Understandable: Information and operation must be understandable
  • Robust: Content must be robust enough to be interpreted by assistive technologies

Best Practices:

  • Use semantic HTML elements
  • Provide text alternatives for images
  • Ensure keyboard navigation
  • Maintain sufficient color contrast
  • Use ARIA labels where appropriate

Building accessible websites not only helps people with disabilities but also improves the overall user experience for everyone.