ECMA 6

Véase ECMA6 new features
Arrow functions
- An arrow function expression has a shorter syntax compared to function expressions and lexically binds the this value. Arrow functions are always anonymous.
Template literals
- Template literals are string literals allowing embedded expressions.
You can use multi-line strings and string interpolation features with template strings:
```
let name = "Bob", time = "today";
`Hello ${name}, how are you ${time}?`
```
You can use multi-line strings and string interpolation features with them.
let vs var
- When used inside a block, let limits the variable's scope to that block. Note the difference between var whose scope is inside the function where it is declared.
const is single-assignment. Static restrictions prevent use before assignment.

ECMA6 new features