JavaScript Essentials 1

Exam Syllabus Contents

• Module 1 – Introduction to JavaScript and Computer Programming
• Module 2 – Variables, Data Types, Type Casting, and Comments
• Module 3 – Operators and User Interactions
• Module 4 – Control Flow – Conditional Execution and Loops
• Module 5 – Functions
• Module 6 – Errors, exceptions, debugging, and troubleshooting

Module 1 – Introduction to JavaScript and Computer Programming

• How to communicate with the computer?;
• How to communicate with the computer?;
• What is JS?;
• JS – Advantages and Limitations;
• Where is JS used today?;
• Development tools;
• Online development environment;
• Local development environment (code editor, interpreter, debugger);
• How can you run your JavaScript code?;
• Executing the code directly in the console.

Module 2 – Variables, Data Types, Type Casting, and Comments

• Naming, declaring and initializing variables;
• Declarations and strict mode;
• Changing variable values;
• Constants;
• Scope (blocks, shadowing, hoisting);
• Data types in JS;
• Primitive data types – Boolean;
• Primitive data types – Number;
• Primitive data types – BigInt;
• Primitive data types – String;
• Primitive data types – undefined
• Primitive data types – Symbol
• Primitive data types – null
• Type casting – primitive construction functions – null
• Type casting – primitive conversions
• Conversion to String
• Conversion to Number
• Conversion to Boolean
• Conversion to BigInt
• Implicit Conversions
• Complex data types – Object
• Complex data types – Array
• Array – the length property
• Array – the indexOf method
• Array – the push method
• Array – the unshift method
• Array – the pop method
• Array – the reverse method
• Array – the slice method
• Array – the concat method
• Single-line comments
• Multi-line comments
• Documentation
• Code toggle

Module 3 – Operators and User Interactions

• What are operators?
• Assignment operators
• Arithmetic operators
• Arithmetic operators – compound assignment operators
• Logical operators
• Logical operators – compound assignment operators
• String operators: concatenation and compound assignment
• Comparison operators
• Other JS operators (typeof, instanceof, delete, and ternary)
• Operator precedence
• How to interact with the user in JavaScript?
• Dialog boxes – alert
• Dialog boxes – confirm
• Dialog boxes – prompt

Module 4 – Control Flow – Conditional Execution and Loops

• What is conditional execution?
• The if statement
• The if–else statement
• The if–else–if statement
• The conditional operator
• The switch–case statement
• What are loops?
• The while loop
• The do–while loop
• The for loop
• The for–of loop
• The for–in loop
• The break and continue statements

Module 5 – Functions

• What are functions?
• Declaring functions
• Calling functions
• Local variables
• The return statement
• Function parameters
• Shadowing
• Parameter validation
• Recursion
• Functions as first-class members
• Function expressions
• Synchronous callbacks
• Asynchronous callbacks
• Arrow functions

Module 6 – Errors, exceptions, debugging, and troubleshooting

• Errors – the programmer’s daily bread
• Natural languages and communication errors
• Errors vs exceptions
• Errors without exceptions
• Limited confidence
• Types of errors – SyntaxError
• Types of errors – ReferenceError
• Types of errors – TypeError
• Types of errors – RangeError
• The try–catch statement
• Conditional exception handling
• The finally statement
• The throw statement and custom errors
• What is debugging?
• Step-by-step execution
• Environment preparation
• The debugger statement
• The resume option
• Code debugging without the debugger statement
• The step over option
• The step into option
• The call stack option
• Viewing and modifying variables
• The step out option
• Measuring code execution time