• http://kangax.github.io/compat-table/es6/

• var => keywords let and const to help prevent unnecessary errors

  • var can be reassigned and redeclared
  • let can be reassigned but not redeclared
  • const cannot be reassigned or redeclared
  • const is not hoisted

• Function Scoping => Function Scoping + Block Scoping

  • var can only be function scoped
  • let and const are block scoped

• Template Literals

  • string concatenation => string interpolation
  • explicit line breaks in a string => multi-line strings

• Default Values

• Anonymous functions => Arrow Functions

  • arrow functions keep context

• Destructuring

  • arrays, objects, nested objects, renaming

• pass individual parameters to a function => rest parameters

• concat => spread operator

• forEach => for..of

• constructors => classes

To learn more, see our resource list for JavaScript for WordPress developers