La variable javascript est-elle également un objet

Objects are variables too. But objects can contain many values.

// Example
let car = "Fiat";  // variable or object named car

const car = {	   // many values (Fiat, 500, white) assigned to a variable or object named car
  type: "Fiat",
  model: "500", 
  color: "white"
};  
Mysterious Macaque