Es6 Javascript

Iterables and Looping

• For looping over iterables, ES6 provides us with for of loop
• For looping over an object,
  • Use Object.keys or .values in for of loop.
  • Also, can use a for in loop where it iterates of enumarable properties.
    • It will however iterate on keys not value of objects.

Symbols

• New primitive added in ES6
• Always unique
• Useful for keys with same names but different values
• Not enumarable

Classes

• Just a wrapper around prototype inheritence.
• Can have static method, setters and getters.

Generators

• Similar to Python’s syntax for generators.
• Use the yield keyword to temporarily hald the program and return the yielded values
• Use the next method to continue execution where it was left of

Proxy objects

• Helps to define custom behaviour for operations like assignment, function invocations etc.
• Can be helpful to write reusable validation methods.