Everything you need to know about VAR

Everything you need to know about LET

Constant

TDZ Temporal Dead Zone

Real-life application of LET

Reflect and its methods

Revocable proxy

What is Proxy

Create private properties using the GET trap

The SET trap

Use a proxy object as the prototype

The defineProperty trap

The apply trap

The constructor trap

JSON

Introduction to CommonJS

The mechanism of CommonJS the module object

Circular dependency

How CommonJS handles cache require.cache

ES6 import and export

How to 'import'

Named export

Default export

The difference between named export and dynamic export dynamic reference

Use ESM in browser

How to enable the strict mode

Changes brought by the strict mode

proto

The prototype property of a constructor

How our own constructor uses the prototype chain

Real-life application of prototype chain

Introduction to the Object constructor

Object.seal()

Object.freeze()

Object.values(), Object.keys(), Object.entries(), Object.is()

Object.setPrototypeOf() and Object.assign()

Object.create() Part 1

Object.create() Part 2

Property attributes

The descriptor object

Create properties with customized attributes

Object.preventExtensions()

Getter and Setter introduction

Create accessors using Object.defineProperty()

Two-way data binding using getter and setter

How to define your own constructor function

Prototype and static properties and methods

Review, comparison and summary

Private properties in constructors

How to define getter and setter in a constructor

Class introduction

How to define properties

How to define methods instance, prototype and static

Fields

Private properties in classes

Who has the highest priority Variable name, function name or argument name

Arguments, caller, callee

Three ways to redirecting THIS of a funciton

Higher-order function and currying

Currying and closure

Extend properties

Extend methods

Application extending the Array() constructor

static get [Symbol.species]

new.target control the instantiation location

Make the parent class 'un-newable'

Mixin

Data structure Queue, Stack, and Heap

Thread and Process, sync and async, blocking and non-blocking

Recursion and stack overflow

Macro tasks, micro tasks, and their queues

Event loop, micro task queue, macro task queue

Interview challenges predict the result of the following programs

process.nextTick()

What is tail call optimization

Real-life application of tail call optimization

Encapsulation, inheritance, polymorphism

Differences between a primitive prop. value and a reference-type prop. value

Douglas Crawford's program recreate Object.create()

The creative combination of a constructor and the call or apply method

The genius combination of two constructors

Parasitic inheritance

instanceof and typeof

'Shallow copy an object

Deep copy an object

Deep assign an object into another one

JavaScript garbage collection and memory leak

Circular reference, reference counting and mark and sweep

Bit, byte, word, memory address and byte addressing

Basic encoding knowledge

Memory address and byte addressing

Bit width

Array basics

String basics

Calculating word count using the split() method

Extract a section of a string

Replace a section of a string

Highlight selected texts

How does an array affect THIS in a function or method

Concatenate two arrays, operating the first and last element

Remove duplicated elements using two methods

Check the entire array and find the matching element

How to remove and replace designated elements and retrieve an array segment

How to find the max and min element and how to reorganize array elements

Array with holes

Data types in JavaScript

Type coercion, wrapper object, explicit and implicit typecasting

Compare NULL, undefined, and NaN

Closure

Real-life application of Closure

Syntax of arrow function

THIS in an arrow function

Application of arrow function

The problems with typeof and instanceof

Create a data type checker by combining typeof and instanceof

Checking data type using the constructor property

Checking data type using the toString method and the call or apply method

Scope chain and closure

Lexical scoping vs. dynamic scoping

Switching two variable values without creating a new variable

Improve the bubble sorting program by ending the loop at the earliest timing

The problem with the inner FOR loop

Avoid unnecessary comparisons using rightSortBorder

LeftSortBorder avoiding unnecessary comparisons while iterating backwards

Count how many times each character of a string has been used

Find the most and least frequently used character

Count words

Find the most and least frequently words

Bubble sorting introduction

Bubble sorting application

Bubble sort backwards

Reorganize array elements in ascending and descending order using bubble sorting

Cocktail sorting

Add the left and right sort border to avoid unnecessary comparisons

Quick sorting introduction

Quick sorting demo

Counting sorting introduction

Deal with duplicated elements

Improve efficiency Part 1

Improve efficiency Part 2

Insertion sorting introduction

Insertion sort demo

Bucket sorting introduction

Bucket sorting demo

Selection sort introduction

Selection sort demo

Time and space complexity big O notation

Destructure array

Destructure object

Destructure string

Destructure number, boolean, null and undefined

Destructure function arguments

Linear structures and how they are stored in memory

Non-linear data structure

How to realize binary heap in JavaScript

Realize the binary heap structure using JavaScript codes

The heap sorting algorithm intro

The heap sorting algorithm demo

Introduction to the Observer pattern

Managing several page elements using the Observer pattern

Two-way data binding using the Observer pattern

The two shocking forms of FOR loop

Challenge iterating over the array backwards

Map basics

Iterate over MAP using FOR OF

SET basics

Application of SET

Introduction to Symbol

How to create a Symbol value

Symbol.for()

Use Symbol value as the property name

Well-known Symbol

The iteration protocol the iterable protocol and the iterator protocol

Create your own iterator

Generator

Application of generator

The next() method

yield

Introduction to Promise

The Promise constructor

The application of Promise

The then able object

Promise.resolve() and Promise.reject()

Limits of Promise.resolve() and Promise.reject()

Process several promises together .all(), .allSettled() and .race()

async await

async await supplement