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AI
- ML Intro
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- ML in JavaScript
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- ML Brain.js
- TFJS Tutorial
- TFJS Operations
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- Ex1 Intro
- Ex1 Data
- Ex1 Model
- Ex1 Training
- Ex2 Intro
- Ex2 Data
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- Ex2 Training
- Graph Intro
- Graph Canvas
- Graph Plotly.js
- Graph Chart.js
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- Graph D3.js
- History of Intelligence
- History of Languages
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AngularJS
- AngularJS HOME
- AngularJS Intro
- AngularJS Expressions
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ASP
- ASP HOME
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- Razor Intro
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- ASP Intro
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- ASP #include
- ASP Global.asa
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AWS
- AWS HOME
- AWS Intro
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- AWS First Recap
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- AWS CloudFormation
- AWS Second Recap
- AWS Networking
- AWS Connectivity
- AWS Subnet and Access
- AWS Global Networking
- AWS Third Recap
- AWS Storage and DBs
- AWS Instance Stores
- AWS EBS
- AWS S3
- AWS EBS vs S3
- AWS Elastic File System
- AWS RDS
- AWS DynamoDB
- AWS DynamoDB vs RDS
- AWS Redshift
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- AWS Additional DB Services
- AWS Fourth Recap
- AWS Cloud Security
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- AWS Seventh Recap
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- AWS Cloud Benefits
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C
- C HOME
- C Intro
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- C Output
- Print Text
- New Lines
- C Comments
- C Variables
- C Data Types
- Data Types
- Type Conversion
- C Constants
- C Operators
- C Booleans
- C If...Else
- C If...Else
- C Short Hand If
- C Switch
- C While Loop
- C For Loop
- C Break/Continue
- C Arrays
- Arrays
- Multidimensional Arrays
- C Strings
- Strings
- Special Characters
- String Functions
- C User Input
- C Memory Address
- C Pointers
- Pointers
- Pointers & Arrays
- C Functions
- C Function Parameters
- C Function Declaration
- C Recursion
- C Math Functions
- C Create Files
- C Write To Files
- C Read Files
- C Structures
- C Enums
- C Examples
- C Exercises
- C Quiz
- C Compiler
C#
- C# HOME
- C# Intro
- C# Get Started
- C# Syntax
- C# Output
- C# Comments
- C# Variables
- Variables
- Constants
- Display Variables
- Multiple Variables
- Identifiers
- C# Data Types
- C# Type Casting
- C# User Input
- C# Operators
- Arithmetic
- Assignment
- Comparison
- Logical
- C# Math
- C# Strings
- Strings
- Concatenation
- Interpolation
- Access Strings
- Special Characters
- C# Booleans
- C# If...Else
- if
- else
- else if
- Short hand if..else
- C# Switch
- C# While Loop
- C# For Loop
- For loop
- Foreach loop
- C# Break/Continue
- C# Arrays
- Arrays
- Loop through an array
- Sort arrays
- Multidimensional arrays
- C# Methods
- C# Method Parameters
- Parameters & Arguments
- Default Parameter
- Return Values
- Named Arguments
- C# Method Overloading
- C# OOP
- C# Classes/Objects
- Classes and Objects
- Multiple Objects
- C# Class Members
- C# Constructors
- C# Access Modifiers
- C# Properties
- C# Inheritance
- C# Polymorphism
- C# Abstraction
- C# Interface
- Interface
- Multiple Interfaces
- C# Enums
- C# Files
- C# Exceptions
- Add Two Numbers
- C# Examples
- C# Compiler
- C# Exercises
- C# Quiz
- C# Certificate
C++
- C++ HOME
- C++ Intro
- C++ Get Started
- C++ Syntax
- C++ Output
- Print Text
- New Lines
- C++ Comments
- C++ Variables
- Declare Variables
- Declare Multiple Variables
- Identifiers
- Constants
- C++ User Input
- C++ Data Types
- Basic Data Types
- Numbers
- Booleans
- Characters
- Strings
- C++ Operators
- Arithmetic
- Assignment
- Comparison
- Logical
- C++ Strings
- Strings
- Concatenation
- Numbers and Strings
- String Length
- Access Strings
- Special Characters
- User Input Strings
- Omitting Namespace
- C++ Math
- C++ Booleans
- Boolean Values
- Boolean Expressions
- C++ Conditions
- if
- else
- else if
- Short hand if..else
- C++ Switch
- C++ While Loop
- While Loop
- Do/While Loop
- C++ For Loop
- C++ Break/Continue
- C++ Arrays
- Arrays
- Arrays and Loops
- Omit Array Size
- Get Array Size
- Multidimensional Arrays
- C++ Structures
- C++ References
- Create References
- Memory Address
- C++ Pointers
- Create Pointers
- Dereferencing
- Modify Pointers
- C++ Functions
- C++ Function Parameters
- Parameters/Arguments
- Default Parameter
- Multiple Parameters
- Return Values
- Pass By Reference
- Pass Arrays
- C++ Function Overloading
- C++ Recursion
- C++ OOP
- C++ Classes/Objects
- C++ Class Methods
- C++ Constructors
- C++ Access Specifiers
- C++ Encapsulation
- C++ Inheritance
- Inheritance
- Multilevel Inheritance
- Multiple Inheritance
- Access Specifiers
- C++ Polymorphism
- C++ Files
- C++ Exceptions
- Add Two Numbers
- C++ Examples
- C++ Compiler
- C++ Exercises
- C++ Quiz
- C++ Certificate
CSS
- CSS HOME
- CSS Introduction
- CSS Syntax
- CSS Selectors
- CSS How To
- CSS Comments
- CSS Colors
- Colors
- RGB
- HEX
- HSL
- CSS Backgrounds
- Background Color
- Background Image
- Background Repeat
- Background Attachment
- Background Shorthand
- CSS Borders
- Borders
- Border Width
- Border Color
- Border Sides
- Border Shorthand
- Rounded Borders
- CSS Margins
- Margins
- Margin Collapse
- CSS Padding
- CSS Height/Width
- CSS Box Model
- CSS Outline
- Outline
- Outline Width
- Outline Color
- Outline Shorthand
- Outline Offset
- CSS Text
- Text Color
- Text Alignment
- Text Decoration
- Text Transformation
- Text Spacing
- Text Shadow
- CSS Fonts
- Font Family
- Font Web Safe
- Font Fallbacks
- Font Style
- Font Size
- Font Google
- Font Pairings
- Font Shorthand
- CSS Icons
- CSS Links
- CSS Lists
- CSS Tables
- Table Borders
- Table Size
- Table Alignment
- Table Style
- Table Responsive
- CSS Display
- CSS Max-width
- CSS Position
- CSS Z-index
- CSS Overflow
- CSS Float
- Float
- Clear
- Float Examples
- CSS Inline-block
- CSS Align
- CSS Combinators
- CSS Pseudo-class
- CSS Pseudo-element
- CSS Opacity
- CSS Navigation Bar
- Navbar
- Vertical Navbar
- Horizontal Navbar
- CSS Dropdowns
- CSS Image Gallery
- CSS Image Sprites
- CSS Attr Selectors
- CSS Forms
- CSS Counters
- CSS Website Layout
- CSS Units
- CSS Specificity
- CSS !important
- CSS Math Functions
- CSS Rounded Corners
- CSS Border Images
- CSS Backgrounds
- CSS Colors
- CSS Color Keywords
- CSS Gradients
- Linear Gradients
- Radial Gradients
- Conic Gradients
- CSS Shadows
- Shadow Effects
- Box Shadow
- CSS Text Effects
- CSS Web Fonts
- CSS 2D Transforms
- CSS 3D Transforms
- CSS Transitions
- CSS Animations
- CSS Tooltips
- CSS Style Images
- CSS Image Reflection
- CSS object-fit
- CSS object-position
- CSS Masking
- CSS Buttons
- CSS Pagination
- CSS Multiple Columns
- CSS User Interface
- CSS Variables
- The var() Function
- Overriding Variables
- Variables and JavaScript
- Variables in Media Queries
- CSS Box Sizing
- CSS Media Queries
- CSS MQ Examples
- CSS Flexbox
- CSS Flexbox
- CSS Flex Container
- CSS Flex Items
- CSS Flex Responsive
- RWD Intro
- RWD Viewport
- RWD Grid View
- RWD Media Queries
- RWD Images
- RWD Videos
- RWD Frameworks
- RWD Templates
- Grid Intro
- Grid Container
- Grid Item
- SASS Tutorial
- CSS Templates
- CSS Examples
- CSS Editor
- CSS Snippets
- CSS Quiz
- CSS Exercises
- CSS Bootcamp
- CSS Certificate
- CSS Reference
- CSS Selectors
- CSS Functions
- CSS Reference Aural
- CSS Web Safe Fonts
- CSS Animatable
- CSS Units
- CSS PX-EM Converter
- CSS Colors
- CSS Color Values
- CSS Default Values
- CSS Browser Support
Cyber Security
- CS HOME
- CS Cyber Crime
- CS Money Making Threats
- CS Dark Web
- CS Networking Basics
- CS Network Layer
- CS Network Transport
- CS Firewalls
- CS Web Applications
- CS Mapping &Port Scanning
- CS Network Attacks
- CS Web Application Attacks
- CS WIFI Attacks
- CS Penetration Testing &Social Engineering
- CS Passwords
- CS Security Operations
- CS Incident Response
- CS Quiz
- CS Certificate
Data Science
- DS HOME
- DS Introduction
- DS What is Data
- DS Database Table
- DS Python
- DS DataFrame
- DS Functions
- DS Data Preparation
- DS Linear Functions
- DS Plotting Functions
- DS Slope and Intercept
- Stat Introduction
- Stat Percentiles
- Stat Standard Deviation
- Stat Variance
- Stat Correlation
- Stat Correlation Matrix
- Stat Correlation vs Causality
- DS Linear Regression
- DS Regression Table
- DS Regression Info
- DS Regression Coefficients
- DS Regression P-Value
- DS Regression R-Squared
- DS Linear Regression Case
- DS Bootcamp
DBaaS
- Database as a Service
DBReplication
- CSV-Database
- Manage Database In Dbreplication.In
- Set Backup Scheduled in Dbreplication.In
- Set Replication Scheduled in Dbreplication.In
Django
- Django Home
- Django Intro
- Django Get Started
- Create Virtual Environment
- Install Django
- Django Create Project
- Django Create App
- Django Views
- Django URLs
- Django Templates
- Django Models
- Django Insert Data
- Django Update Data
- Django Delete Data
- Django Update Model
- Prepare Template and View
- Add Link to Details
- Add Master Template
- Add Main Index Page
- Django 404 Template
- Add Test View
- Django Admin
- Create User
- Include Models
- Set List Display
- Update Members
- Add Members
- Delete Members
- Django Variables
- Django Tags
- Django If Else
- Django For Loop
- Django Comment
- Django Include
- QuerySet Introduction
- QuerySet Get
- QuerySet Filter
- QuerySet Order By
- Add Static Files
- Install WhiteNoise
- Collect Static Files
- Add Global Static Files
- Add Styles to the Project
- PostgreSQL Intro
- Create AWS Account
- Create Database in RDS
- Connect to Database
- Add Members
- Elastic Beanstalk (EB)
- Create requirements.txt
- Create django.config
- Create .zip File
- Deploy with EB
- Update Project
- Add Slug Field
- Add Bootstrap 5
- Template Tag Reference
- Filter Reference
- Field lookups Reference
- Django Compiler
- Django Exercises
- Django Quiz
- Django Certificate
- Add Main Index Page
- Django Template Variables
- Filter Reference
- Django Variables
- Django Variables
- Django Tags
- Django For Loop
- QuerySet Introduction
- Add Static Files
DS Database Table
- Data Science - Database Table
Excel
- Excel HOME
- Excel Introduction
- Excel Get Started
- Excel Overview
- Excel Syntax
- Excel Ranges
- Excel Fill
- Filling
- Double Click to Fill
- Excel Move Cells
- Excel Add Cells
- Excel Delete Cells
- Excel Undo Redo
- Excel Formulas
- Excel Relative Reference
- Excel Absolute Reference
- Excel Arithmetic Operators
- Excel Addition
- Excel Subtraction
- Excel Multiplication
- Excel Division
- Excel Parentheses
- Excel Functions
- Excel Formatting
- Excel Format Painter
- Excel Format Colors
- Excel Format Fonts
- Excel Format Borders
- Excel Format Numbers
- Excel Format Grids
- Excel Format Settings
- Excel Sort
- Excel Filter
- Excel Tables
- Tables
- Table Design
- Table Resizing
- Remove Duplicates
- Convert Table to Range
- Table Style
- Excel Conditional Format
- Excel Highlight Cell Rules
- Highlight Cell Rules
- HCR - Greater Than
- HCR - Less Than
- HCR - Between
- HCR - Equal To
- HCR - Text That Contains
- HCR - Date Occurring
- HCR - Unique Values
- Excel Top Bottom Rules
- Top Bottom Rules
- Above Below Average
- Excel Data Bars
- Excel Color Scales
- Excel Icon Sets
- Excel Manage Rules (CF)
- Excel Charts
- Charts
- Bar Charts
- Stacked Bar Charts
- Column Charts
- Stacked Column Charts
- Pie Charts
- Line Charts
- Stacked Line Charts
- 100% Stacked Line Charts
- Radar Charts
- Excel Charts Customization
- Table Pivot Intro
- Case: Poke Mart
- Case: Poke Mart, Styling
- AND
- AVERAGE
- AVERAGEIF
- AVERAGEIFS
- CONCAT
- COUNT
- COUNTA
- COUNTBLANK
- COUNTIF
- COUNTIFS
- IF
- IFS
- LEFT
- LOWER
- MAX
- MEDIAN
- MIN
- MODE
- NPV
- OR
- RAND
- RIGHT
- STDEV.P
- STDEV.S
- SUM
- SUMIF
- SUMIFS
- TRIM
- VLOOKUP
- XOR
- Convert Time to Seconds
- Difference Between Times
- NPV (Net Present Value)
- Remove Duplicates
- Introduction to Excel
- Learn Data Calculations
- Learn Data Visualization
- Learn to Create a Budget
- Learn to Create a Timeline
- Learn to Style in Excel
- Excel Exercises
- Excel Certificate
- Excel Keyboard Shortcuts
- Excel HOME
- Excel HOME
- Excel Get Started
GIT
- Git HOME
- Git Intro
- Git Get Started
- Git New Files
- Git Staging Environment
- Git Commit
- Git Help
- Git Branch
- Git Branch Merge
- {{title}} Get Started
- {{title}} Edit Code
- Pull from {{title}}
- Push to {{title}}
- {{title}} Branch
- Pull Branch from {{title}}
- Push Branch to {{title}}
- GitHub Flow
- {{title}} Pages
- {{title}} Fork
- Git Clone from {{title}}
- {{title}} Send Pull Request
- Git .gitignore
- Git Security SSH
- {{title}} Add SSH
- Git Revert
- Git Reset
- Git Amend
- Git Exercises
- Git Quiz
- Git Help
GO
- Go Home
- Go Introduction
- Go Get Started
- Go Syntax
- Go Comments
- Go Variables
- Declare Variables
- Declare Multiple Variables
- Naming Rules
- Go Constants
- Go Output
- Output Functions
- Formatting Verbs
- Go Data Types
- Basic Data Types
- Boolean
- Integer
- Float
- String
- Go Arrays
- Go Slices
- Create Slice
- Modify Slice
- Go Operators
- Operators
- Arithmetic
- Assignment
- Comparison
- Logical
- Bitwise
- Go Conditions
- Conditions
- if Statement
- if else Statement
- else if Statement
- Nested if
- Go Switch
- Single-case
- Multi-case
- Go Loops
- Go Functions
- Create/Call Function
- Parameters/Arguments
- Function Returns
- Recursion
- Go Struct
- Go Maps
- Go Exercises
- Go Compiler
HTML
- HTML HOME
- HTML Introduction
- HTML Editors
- HTML Basic
- HTML Elements
- HTML Attributes
- HTML Headings
- HTML Paragraphs
- HTML Styles
- HTML Formatting
- HTML Quotations
- HTML Comments
- HTML Colors
- Colors
- RGB
- HEX
- HSL
- HTML CSS
- HTML Links
- Links
- Link Colors
- Link Bookmarks
- HTML Images
- Images
- Image Map
- Background Images
- The Picture Element
- HTML Favicon
- HTML Page Title
- HTML Tables
- HTML Tables
- Table Borders
- Table Sizes
- Table Headers
- Padding & Spacing
- Colspan & Rowspan
- Table Styling
- Table Colgroup
- HTML Lists
- Lists
- Unordered Lists
- Ordered Lists
- Other Lists
- HTML Block & Inline
- HTML Classes
- HTML Id
- HTML Iframes
- HTML JavaScript
- HTML File Paths
- HTML Head
- HTML Layout
- HTML Responsive
- HTML Computercode
- HTML Semantics
- HTML Style Guide
- HTML Entities
- HTML Symbols
- HTML Emojis
- HTML Charset
- HTML URL Encode
- HTML vs. XHTML
- HTML Forms
- HTML Form Attributes
- HTML Form Elements
- HTML Input Types
- HTML Input Attributes
- HTML Input Form Attributes
- HTML Canvas
- HTML SVG
- HTML Media
- HTML Video
- HTML Audio
- HTML Plug-ins
- HTML YouTube
- HTML Geolocation
- HTML Drag/Drop
- HTML Web Storage
- HTML Web Workers
- HTML SSE
- HTML Examples
- HTML Editor
- HTML Quiz
- HTML Exercises
- HTML Bootcamp
- HTML Certificate
- HTML Summary
- HTML Accessibility
- HTML Tag List
- HTML Attributes
- HTML Global Attributes
- HTML Browser Support
- HTML Events
- HTML Colors
- HTML Canvas
- HTML Audio/Video
- HTML Doctypes
- HTML Character Sets
- HTML URL Encode
- HTML Lang Codes
- HTTP Messages
- HTTP Methods
- PX to EM Converter
- Keyboard Shortcuts
Java
- Java HOME
- Java Intro
- Java Get Started
- Java Syntax
- Java Output
- Print Text
- Print Numbers
- Java Comments
- Java Variables
- Variables
- Print Variables
- Declare Multiple Variables
- Identifiers
- Java Data Types
- Data Types
- Numbers
- Booleans
- Characters
- Non-primitive Types
- Java Type Casting
- Java Operators
- Java Strings
- Strings
- Concatenation
- Numbers and Strings
- Special Characters
- Java Math
- Java Booleans
- Java If...Else
- If...Else
- Short Hand If...Else
- Java Switch
- Java While Loop
- Java For Loop
- For Loop
- For-Each Loop
- Java Break/Continue
- Java Arrays
- Arrays
- Loop Through an Array
- Multidimensional Arrays
- Java Methods
- Java Method Parameters
- Java Method Overloading
- Java Scope
- Java Recursion
- Java OOP
- Java Classes/Objects
- Java Class Attributes
- Java Class Methods
- Java Constructors
- Java Modifiers
- Java Encapsulation
- Java Packages / API
- Java Inheritance
- Java Polymorphism
- Java Inner Classes
- Java Abstraction
- Java Interface
- Java Enums
- Java User Input
- Java Date
- Java ArrayList
- Java LinkedList
- Java HashMap
- Java HashSet
- Java Iterator
- Java Wrapper Classes
- Java Exceptions
- Java RegEx
- Java Threads
- Java Lambda
- Java Files
- Java Create/Write Files
- Java Read Files
- Java Delete Files
- Add Two Numbers
- Count Words
- Reverse a String
- Sum of Array Elements
- Area of Rectangle
- Even or Odd Number
- Java Keywords
- abstract
- boolean
- break
- byte
- case
- catch
- char
- class
- continue
- default
- do
- double
- else
- enum
- extends
- final
- finally
- float
- for
- if
- implements
- import
- instanceof
- int
- interface
- long
- new
- package
- private
- protected
- public
- return
- short
- static
- super
- switch
- this
- throw
- throws
- try
- void
- while
- Java String Methods
- Java Math Methods
- Java Examples
- Java Compiler
- Java Exercises
- Java Quiz
- Java Certificate
- Java Operators
JavaScript
- JS HOME
- JS Introduction
- JS Where To
- JS Output
- JS Statements
- JS Syntax
- JS Comments
- JS Variables
- JS Let
- JS Const
- JS Operators
- JS Arithmetic
- JS Assignment
- JS Data Types
- JS Functions
- JS Objects
- JS Events
- JS Strings
- JS String Methods
- JS String Search
- JS String Templates
- JS Numbers
- JS BigInt
- JS Number Methods
- JS Number Properties
- JS Arrays
- JS Array Methods
- JS Array Sort
- JS Array Iteration
- JS Array Const
- JS Dates
- JS Date Formats
- JS Date Get Methods
- JS Date Set Methods
- JS Math
- JS Random
- JS Booleans
- JS Comparisons
- JS If Else
- JS Switch
- JS Loop For
- JS Loop For In
- JS Loop For Of
- JS Loop While
- JS Break
- JS Iterables
- JS Sets
- JS Maps
- JS Typeof
- JS Type Conversion
- JS Bitwise
- JS RegExp
- JS Precedence
- JS Errors
- JS Scope
- JS Hoisting
- JS Strict Mode
- JS this Keyword
- JS Arrow Function
- JS Classes
- JS Modules
- JS JSON
- JS Debugging
- JS Style Guide
- JS Best Practices
- JS Mistakes
- JS Performance
- JS Reserved Words
- JS Versions
- JS 2009 (ES5)
- JS 2015 (ES6)
- JS 2016
- JS 2017
- JS 2018
- JS 2019
- JS 2020
- JS 2021/2022
- JS IE / Edge
- JS History
- Object Definitions
- Object Properties
- Object Methods
- Object Display
- Object Accessors
- Object Constructors
- Object Prototypes
- Object Iterables
- Object Sets
- Object Maps
- Object Reference
- Function Definitions
- Function Parameters
- Function Invocation
- Function Call
- Function Apply
- Function Bind
- Function Closures
- Class Intro
- Class Inheritance
- Class Static
- JS Callbacks
- JS Asynchronous
- JS Promises
- JS Async/Await
- DOM Intro
- DOM Methods
- DOM Document
- DOM Elements
- DOM HTML
- DOM Forms
- DOM CSS
- DOM Animations
- DOM Events
- DOM Event Listener
- DOM Navigation
- DOM Nodes
- DOM Collections
- DOM Node Lists
- JS Window
- JS Screen
- JS Location
- JS History
- JS Navigator
- JS Popup Alert
- JS Timing
- JS Cookies
- Web API Intro
- Web Forms API
- Web History API
- Web Storage API
- Web Worker API
- Web Fetch API
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JavaScript Reserved Words

In JavaScript you cannot use these reserved words as variables, labels, or function names:

abstract	arguments	await*	boolean
break	byte	case	catch
char	class*	const*	continue
debugger	default	delete	do
double	else	enum*	eval
export*	extends*	false	final
finally	float	for	function
goto	if	implements	import*
in	instanceof	int	interface
let*	long	native	new
null	package	private	protected
public	return	short	static
super*	switch	synchronized	this
throw	throws	transient	true
try	typeof	var	void
volatile	while	with	yield

Words marked with* was new in ECMAScript 5 and ECMAScript 6.

You can read more about the different JavaScript versions in the chapter JS Versions.

Removed Reserved Words

The following reserved words have been removed from the ECMAScript 5/6 standard:

abstract	boolean	byte	char
double	final	float	goto
int	long	native	short
synchronized	throws	transient	volatile

Do not use these words as variables. ECMAScript 5/6 does not have full support in all browsers.

JavaScript Objects, Properties, and Methods

You should also avoid using the name of JavaScript built-in objects, properties, and methods:

Array	Date	eval	function
hasOwnProperty	Infinity	isFinite	isNaN
isPrototypeOf	length	Math	NaN
name	Number	Object	prototype
String	toString	undefined	valueOf

Java Reserved Words

JavaScript is often used together with Java. You should avoid using some Java objects and properties as JavaScript identifiers:

getClass	java	JavaArray	javaClass
JavaObject	JavaPackage

Other Reserved Words

JavaScript can be used as the programming language in many applications.

You should also avoid using the name of HTML and Window objects and properties:

alert	all	anchor	anchors
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