JavaScript Fundamentals

Store and reference data using variables declared with let and const, distinguishing between constant and re-assignable values

Work with primitive data types including strings for text content, numbers for quantities, booleans for toggles, null and undefined for missing values

Use arithmetic, comparison, and logical operators to perform calculations and create conditions for UI logic

Implement conditional logic using if-else and switch statements to make decisions based on user input or application state

Define and call functions with parameters and return values to encapsulate reusable UI logic

Model data structures such as user profiles or component states using JavaScript objects by creating, accessing, and modifying their properties

Create and manipulate arrays including adding, removing, and accessing elements

Use loops such as for and while to iterate over data arrays