List all the new things introduced in ES6

Q: List all the new things introduced in ES6

Arrow functions Classes Modules Promises Template strings Destrcuturing object, array Spread and rest operator Let & const keywords For–of iterator Map + Set + WeakMap + WeakSet Generators Symbols Proxies Improved support for Unicode Tail call optimisation Subclassing built-ins

Difficulty: 5/10

ES6 syntax, modules, async primitives

1
Arrow functions
2
Classes
3
Modules
4
Promises
5
Template strings
6
Destrcuturing object, array
7
Spread and rest operator
8
Let & const keywords
9
For–of iterator
10
Map + Set + WeakMap + WeakSet
11
Generators
12
Symbols
13
Proxies
14
Improved support for Unicode
15
Tail call optimisation
16
Subclassing built-ins

Scenario Questions

0-2 years experience

1We have a function that uses var and a traditional function expression; how would you rewrite it using let/const and an arrow function?
2If you need to concatenate several strings and embed variables, what ES6 syntax would you use and why?
3Show me how you would import a named export and a default export from an ES6 module in a small script.

Follow-up Questions

Which of those features have you found most useful in production?
How do you decide when to use a class versus a factory function?
What tooling do you rely on to support ES6 in older browsers?