How do you Determine the Class of JavaScript Objects?

Determining the Class of JavaScript Objects

In Java, the .getClass() method allows developers to determine the class of an object. While JavaScript does not have an exact equivalent, there are several options that can provide similar functionality:

1. typeof:
Returns a string representing the type of the object: "function" for functions and "object" for most other types.

2. instanceof:
Checks whether an object is an instance of a specific constructor function.

3. obj.constructor:
References the constructor function that created the object.

4. func.prototype, proto.isPrototypeOf:
The func.prototype property points to the prototype object of the constructor, and proto.isPrototypeOf(obj) checks if an object inherits from a prototype.

Example:

function Foo() {}
var foo = new Foo();

console.log(typeof Foo); // "function"
console.log(typeof foo); // "object"
console.log(foo instanceof Foo); // true
console.log(foo.constructor.name); // "Foo"
console.log(Foo.prototype.isPrototypeOf(foo)); // true

Note: Uglify JS may change non-global class names during compilation. To prevent this, set the --mangle parameter to false while using Grunt or Gulp.

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