JS tips

Variables:
  Avoid global variables:
  Variables can be accessed in local scope or global scope. 
  Local and global variable with the same name => javascript will prioritize the local variable.
  Local variables are deleted once the local execution context is complete. Global variables 
  
References
  Use const or let for references
  Avoid using var (https://developer.mozilla.org/en-US/docs/Glossary/Hoisting)
    
Functions:
  Arrow function
    Is a function expression not a function declaration
    Cannot use a constructor. Is not called with new. Does not use 'this'.
    Few characters shorter
  Basic function 
Name conventions:
  Files
    
  Functions
  Class
Destructuring
  Object
  Array
Recursion
  Avoid nesting more than two levels. It can be difficult to follow.
Comments
  Use multi-line comment as: /** .... */
  Use single line comment as: //
JS features that would like to use
  Optional chaining operator
Semicolons
  Use semicolons. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Lexical_grammar#automatic_semicolon_insertion
  
References:
  https://eslint.org/docs/latest/rules/
  https://arcticicestudio.github.io/styleguide-javascript/