Get the Name of an Object’s Type

Get the name of an object’s type

When working with JavaScript, there may be times when you need to retrieve the name of an object’s type. This can be useful for debugging purposes or when you want to perform different actions based on the type of an object. In this blog post, we will explore different solutions to get the name of an object’s type in JavaScript.

Solution 1: Using the typeof operator

The typeof operator in JavaScript returns a string indicating the type of the operand. By applying this operator to an object, we can retrieve the name of its type. Here’s an example:

const obj = {};
const typeName = typeof obj;
console.log(typeName); // Output: "object"

In the above code snippet, we create an empty object and use the typeof operator to get its type. The result is stored in the typeName variable, which is then logged to the console.

Solution 2: Using the constructor property

Every JavaScript object has a constructor property that refers to the constructor function used to create the object. By accessing this property, we can retrieve the name of the object’s type. Here’s an example:

function Person(name) {
  this.name = name;
}

const person = new Person("John");
const typeName = person.constructor.name;
console.log(typeName); // Output: "Person"

In the above code snippet, we define a constructor function Person and create a new object person using the new keyword. We then access the constructor.name property of the object to get its type name, which is logged to the console.

Solution 3: Using the Object.prototype.toString() method

The Object.prototype.toString() method returns a string representing the object. By calling this method on an object, we can retrieve a string containing the object’s type. Here’s an example:

const obj = {};
const typeName = Object.prototype.toString.call(obj).slice(8, -1);
console.log(typeName); // Output: "Object"

In the above code snippet, we create an empty object and call the Object.prototype.toString() method on it. We then use the slice() method to extract the type name from the resulting string, excluding the leading “[object ” and trailing “]”.

These are three different solutions to get the name of an object’s type in JavaScript. Depending on your specific use case, you can choose the solution that best fits your needs. Remember to always test your code and consider edge cases to ensure its reliability.

Happy coding!