Shorthand functions are not standard yet. You should bet on arrow function expressions in Harmony for now: [1,2,3,4].map(x => x*x)) // [1,4,9,16] (also note

Shorthand functions are not standard yet. You should bet on arrow function expressions in Harmony for now: [1,2,3,4].map(x => x*x)) // [1,4,9,16] (also note that |this| is lexically bound in the case of fat arrow functions) Also, destructuring objects: let obj = { foo: 42, bar: { baz: 32 } } let { foo, bar } = obj; foo // 42 bar.baz // 32 https://developer.mozilla.org/en-US/docs/Web/JavaScript/New_in_JavaScript/1.7 https://developer.mozilla.org/en-US/docs/Web/JavaScript/New_... List of all the goodies: https://developer.mozilla.org/en-US/docs/Web/JavaScript/New_in_JavaScript https://developer.mozilla.org/en-US/docs/Web/JavaScript/New_... edit: formatting