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

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