What is new in ECMAScript 5 (ES5)

ECMAScript 5 (ES5): The 5th edition of ECMAScript, standardized in 2009.

What is new in ES5?

New Features in ECMAScript 5 (ES5)

• Data and Accessors
• Strict mode

Syntactic Changes in ECMAScript 5 (ES5)

• Reserved work as property key
• Legal trailing commas
• Multi-line string literals

New Functionality in ECMAScript 5 (ES5)

• Getting & setting prototypes
• Maintaining property attributes via property descriptor
• Listing properties
• Protecting objects
• New function methods
• New array methods

JSON Support in ECMAScript 5 (ES5)

• JSON.parse()
• JSON.stringify()
• Some built-in objects have special toJSON() methods