Property access operators

Accessing properties in JavaScript is achieved by using one of two operators:

• Direct property access: obj.property
• Computed property access: obj[property]

Direct property access

The syntax for directly accessing a property is a single period character, with a left-side operand that is the object you wish to access, and with a right-side operand that is the property name you wish to access:

const street = {
  name: 'Marshal St.'
};

street.name; // => "Marshal St."

The right-side operand must be a valid JavaScript identifier, and as such, cannot start with a number, cannot contain whitespace, and in general, cannot contain any punctuation characters that exist elsewhere within...