New posts in Ecmascript 5

Get array of object's keys

Any performance benefit to "locking down" JavaScript objects?

Object.keys() complexity?

how to stop Javascript forEach?

JavaScript: Can ECMAScript 5's Strict Mode ("use strict") be enabled using single quotes ('use strict')?

How to force google closure compiler to keep "use strict"; in the compiled js code?

What is the purpose of the var keyword and when should I use it (or omit it)?