JavaScript Output Questions
What Does This Code Print?

Classic setTimeout vs Promise

Nested setTimeout and Promise

async/await execution order

Promise chaining order

Promise constructor is synchronous

async/await vs .then chain

Multiple awaits

queueMicrotask vs Promise

Promise.all ordering

Generator execution order

Generator two-way communication

requestAnimationFrame vs setTimeout order

async/await with rejection

Custom iterable with for...of

Promise rejection in async generator

Promise.all vs sequential await performance

Classic var in loop closure

let in loop closure (fix)

Closure counter

IIFE closure

Closure variable lookup

Shared closure mutation

Block scope with let

Module pattern with closure

Scope chain lookup

Block scope vs function scope

Temporal Dead Zone with let

Closure in object methods

Map key reference equality

Set uniqueness rules

Nested object destructuring with defaults

Spread vs rest in different positions

Object spread override order

Module pattern with revealed state

WeakMap with garbage collectible keys

Method extracted from object

Arrow function this

this in nested function

bind creates new function

setTimeout this loss

this in class methods

call chain with this

new binding creates fresh object

Chained method calls and this

Proxy get trap intercepts access

Prototype chain property lookup

var hoisting

Function declaration hoisting

Function expression not hoisted

let temporal dead zone

Function vs var hoisting order

Hoisting inside blocks

Class declaration hoisting (TDZ)

Hoisting with default exports and imports

Loose equality coercion

Addition vs concatenation

Falsy values comparison

NaN comparison

Object to primitive coercion

Unary plus operator

Comparison coercion

Tricky array coercion

Symbol coercion rules

Default parameter coercion

Symbol.toPrimitive custom coercion

Optional chaining with nullish coalescing