JavaScript tests & Compatibility tables

In this web site I have collected various JavaScript tests, to display code samples, have them run and check web browser compatibility.

Test pages

• Testing JavaScript 1.6
• Testing JavaScript 1.7
• Testing JavaScript 1.8
• Testing JavaScript 1.8.1
• Testing getters and setters, and Object.defineProperty
• Testing sessionStorage & localStorage (DOM Storage / Web Storage)
• Testing native JSON

Compatibility tables

• JavaScript 1.6
• JavaScript 1.7
• JavaScript 1.8
• JavaScript 1.8.1
• Getters and setters, and Object.defineProperty
• sessionStorage & localStorage (DOM Storage / Web Storage)
• Native JSON

JavaScript 1.6

Method/feature	Web browser support
Array extras:
The indexOf method	2.0+ 1.0+ 3.0+ 9.5+
The lastIndexOf method	2.0+ 1.0+ 3.0+ 9.5+
The every method	2.0+ 1.0+ 3.0+ 9.5+
The filter method	2.0+ 1.0+ 3.0+ 9.5+
The forEach method	2.0+ 1.0+ 3.0+ 9.5+
The map method	2.0+ 1.0+ 3.0+ 9.5+
The some method	2.0+ 1.0+ 3.0+ 9.5+
Array and String generics:
Array generics	2.0+
String generics	2.0+

JavaScript 1.7

Method/feature	Web browser support
Generators	2.0+
Iterators	2.0+
Array comprehensions	2.0+
Using let for block scope	2.0+
Destructuring assignment	2.0+ 9.5+ (partial support, some combinations don't work)
Destructuring assignment with let statement	2.0+

JavaScript 1.8

Method/feature	Web browser support
Expression closures	3.0+
Generator expressions	3.0+
Array extras:
reduce	3.0+ 4.0+ 4.0+ 10.5+
reduceRight	3.0+ 4.0+ 4.0+ 10.5+

JavaScript 1.8.1

Method/feature	Web browser support
Object.getPrototypeOf	3.5+ 5.0+
String extras:
The trim method	3.5+ 5.0+ 10.5+
The trimLeft method	3.5+ 5.0+
The trimRight method	3.5+ 5.0+

Getters and setters, and Object.defineProperty

Method/feature	Web browser support
Regular getters and setters:
Object literal notation	9.0+ 2.0+ 1.0+ 3.0+ 9.5+
Object notation	2.0+ 1.0+ 3.0+ 9.5+
On DOM elements	2.0+ 1.0+ 3.0+ 9.5+
Object.defineProperty:
On Objects	9.0+ 4.0+ 5.0+ 5.1.7+ 11.6+
On DOM elements	8.0+ 4.0+ 5.0+ 5.1.7+ 11.6+

DOM Storage / Web Storage

Method/feature	Web browser support
sessionStorage	8.0+ 2.0+ 5.0+ 4.0+ 10.5+
localStorage	8.0+ 3.5+ 4.0+ 4.0+ 10.5+

Native JSON

Method/feature	Web browser support
Native JSON:
JSON.parse	8.0+ 3.5+ 4.0+ 4.0+ 10.5+
JSON.stringify	8.0+ 3.5+ 4.0+ 4.0+ 10.5+