The best way to check if a variable is an object or not is to use the instanceof operator.
The instanceof operator expects two operands. So, on the left-hand side, specify the variable you want to check and on the right-hand side, mention Object. If the variable is an object, then the instanceof operator evaluates to true otherwise false.
variable instanceof Object
The following example shows how to check if a variable is an object or not:
let fullname = {
firstName: "Khushboo",
lastName: "Natani"
};
let x = "JavaScript";
console.log(fullname instanceof Object); //true
console.log(x instanceof Object); //false
It is recommended that you should not use the typeof operator to check whether a variable is an object or not because the typeof operator returns "object" for all non-primitive values, and this will confuse you.
let fullname = {
firstName: "Khushboo",
lastName: "Natani"
};
let x = [1, 2, 3, 4];
let y = null;
console.log(typeof fullname); //"object"
console.log(typeof x); //"object"
console.log(typeof y); //"object"
In this example, you can see that the typeof operator returns "object" for an array x.
