JAVASCRIPT

js class check if new instance

new Date() instanceof Date;  // => true

how to check which class a object is from

if (obj instanceof C) {
//your code
}

Check Object Is Instance Of Class

	class Person
	{
		constructor(firstName, lastName)
		{
			this.firstName = firstName;
			this.lastName = lastName;
			
		}
		
	}
	
	
	function test()
	{
		
		const p = new Person();
		
		console.log(p instanceof Person);
		
	}