About FitQuest

Feature	Where Used	Exam Objective
let, const	Throughout script.js — state, user, token, XP_TABLE	Variables & primitive data types
Number, Boolean, String primitives	XP calculations, active flags, email/username strings	Primitive data types
parseInt(), parseFloat()	Parsing form inputs for workouts, diet entries, goals	Type conversion
Arithmetic operators (+, -, *, /, %)	XP calculations, calorie totals, streak logic, chart %	Assignment & arithmetic operators
Math.round(), Math.min(), Math.max(), Math.pow(), Math.floor(), Math.random()	XP curve, progress percentages, level-up messages	Built-in Math functions
if / else statements	Auth checks, XP bonuses, streak logic, UI state	Decision statements
for loops, forEach, map, filter, reduce	XP level table, list rendering, stats aggregation	Loops
&&, ||, !	Auth guards, null coalescing, form validation	Logical operators
Functions with parameters + return values	api(), toast(), escHtml(), workoutCard(), levelForXp()	Functions, parameters, return values
Local vs global scope	Module pattern, state object, closures in event handlers	Scope rules
Arrays: push(), length, iteration	state.workouts, pagesVisited, badgeQueue, XP_TABLE	Arrays
Objects	state object, user objects, ACTIVITY_ICONS map	Objects
Date object	Greeting logic, chart dates, session timestamps	Date object
getElementById(), querySelector()	Throughout DOM manipulation	DOM manipulation
innerHTML, textContent	Rendering workout cards, badge lists, stats	DOM manipulation
onclick, onchange, DOMContentLoaded, keydown	All form submissions, nav clicks, modal close	Event handling
try...catch blocks	Every API call, service worker, token validation	Exception handling
console.log()	Boot message listing all JS features used	Debugging
Comments & indentation	Consistent throughout all files	Best practices

/project-root
├── index.html       ← SPA entry point
├── about.html      ← This page
├── styles.css      ← All styles (Flexbox, Grid, responsive)
├── script.js       ← All frontend JS
├── sw.js           ← Service Worker (PWA offline)
├── manifest.json   ← PWA manifest (installable)
├── README.md       ← Documentation
└── backend/        ← Node.js API server