JavaScript in Depth
JS: Object. Index
By Xah Lee. Date:
2026-09-12
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JavaScript. Object and Inheritance
JS: Object. Index
JS: Object (basics)
JS: Object Overview
JS: Object Type
JS: Test is object type
JS: Find Object's sub-type
JS: Prototype and Inheritance
JS: Prototype Chain
JS: Object.prototype.isPrototypeOf
JS: Get Set Prototype
JS: Show Prototype Chain 📜
JS: Prototype Tree
JS: Dot Notation and Prototype Chain
JS: Create Object
JS: Object Literal Expression
JS: Object.create
JS: Object Literal Expression vs Object.Create
JS: Prevent Adding Property
JS: Deep Copy Array or Object 📜
JS: Test Equality of Array and Object by Content 📜
JS: Add Method to Prototype
JS: Object (class)
JS: Object Constructor
JS: Object.prototype
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JavaScript in Depth
Basics
Filename Extension
Run JavaScript
Comment
Print
Value Types
Quote String
Number
Math Operators
Assignment
Boolean
Test Equality
Conditional
Loop
Array basics
Object basics
Function basics
In-depth
Variable
String
Property
Object
Array
Function
Class
Iterable
Module
Try Catch Throw
Regex
ECMAScript News
Obj Ref
JS Object Reference
Misc index
Misc. Index