Introduction to JavaScript

• What is JavaScript and how it’s used – history and practical applications
• Frontend vs. Backend – differences and possibilities
• Development environment – VS Code, Node.js, console, debugger

• Declaration (let, const, var) and Differences Between Them
• Numbers, Strings, Boolean, Null, Undefined
• Working with Types, Comparison, and Conversion
• Operators: Arithmetic, Relational, Logical

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• Basic Principles (Sequence, Selection, Iteration)
• Data and Process Structures
• Examples

• Conditionals (if, else, switch)
• Loops (for, while, do…while)
• Iterating Over Arrays (forEach, map)
• Break and continue

• Function Declaration and Invocation
• Parameters and Return Values
• Function Expressions vs. Declarations, Arrow Functions
• Scope and this
• Immutability and References:
  • Difference Between Primitive and Reference Types
  • Copying Objects and Arrays
  • Spread Syntax and Object.assign
  • Why Immutability Matters (e.g., in React)

• Creating and Manipulating Arrays and Objects
• Array Methods (push, pop, map, filter, find)
• Iteration and Destructuring
• Nested Structures and Accessing Values

• Strings
  • Basic Methods (length, toLowerCase, slice, replace, includes, …)
  • Template Literals
  • String Concatenation
  • Regular Expressions
    • Basic Syntax and Usage (test, match, replace)
    • Simple Validations (email, phone, postal code)
• Numbers
  • Math: rounding, random numbers, min/max, powers
  • Parsing (parseInt, parseFloat, Number)
  • Precision and Decimal Operations
• Date and Time
  • Working with the Date Object, current time, time differences
  • Formatting and time calculations

• Object Creation
• Constructor Functions and Classes (class, constructor)
• Inheritance and the Prototype Chain
• Practical Use in Application Design

• Accessing Page Elements (getElementById, querySelector)
• DOM Manipulation
• Events and Responding to User Input

• What is Node.js and Why Use It
• Running a Simple Script in Node.js
• Terminal Input and Output (process.stdin, process.stdout)
• Basic File Operations (fs module)
• Basic HTTP Server (http module)
• Fundamentals of HTTP Requests

• Callback Functions
• Promises and Their Usage
• Async/Await – Modern Approach
• Practical Examples (e.g., file reading, API calls)

• try, catch, finally
• Error Propagation
• Asynchronous Exceptions

• Splitting Code into Modules (CommonJS and ES Modules)
• Import/Export
• Creating Your Own Package
• Basics of package.json and npm

• Simple Client (HTML + JS) Sending Data to the Server
• Node.js Server Handling Requests and Saving Data to a File
• Asynchronous Processing and Responding to the Client