Variables

• Use lowerCamelCase when declaring variables as well as Meaningful Names

  // Doconst firstName = 'Freddie';
  // Avoidconst first_name = 'Freddie';

• Use UPPERCASE for Constants Capitalized const values SNAKE UPPER CASE

  // Doconst SECONDS_IN_A_DAY = 86400;const PI = 3.14
  // Avoidconst seconds_in_a_day = 86400;const pi = 3.14

• Object/Array creation
  use trailing commas and push short declaration on a single line. Only quote keys when your interpreter complains:

  // Dovar pets = ['Dog', 'Cat'];
  var dog = {  breed: 'Husky',  barks: true,};
  // Avoidvar pets = [  'Dog', 'Cat'];var dog = {breed: 'Husky'  , barks: true  };