how to get type of javascript interface property

How to Get Type of JavaScript Interface Property#

If you are working with JavaScript, you may need to get the type of a property in an interface. There are several ways to achieve this:

1. Using the typeof operator:#

    let myObject = {
        myProperty: "Hello World"
    };
    
    console.log(typeof myObject.myProperty); // output: string

In this example, we define an object called "myObject" with a property called "myProperty". We use the typeof operator to get the type of the property, which in this case is a string.

2. Using the instanceof operator:#

    let myArray = [1, 2, 3];
    
    console.log(myArray instanceof Array); // output: true

In this example, we define an array called "myArray". We use the instanceof operator to check if the array is an instance of the Array object.

3. Using the constructor property:#

    function Person(name) {
        this.name = name;
    }
    
    let myPerson = new Person("John");
    
    console.log(myPerson.constructor.name); // output: Person

In this example, we define a constructor function called "Person" that creates objects with a "name" property. We create a new object called "myPerson" using the constructor function. We use the constructor property to get the name of the constructor function.

4. Using the Object.prototype.toString() method:#

    let myNumber = 123;
    
    console.log(Object.prototype.toString.call(myNumber)); // output: [object Number]

In this example, we define a number called "myNumber". We use the Object.prototype.toString() method to get the type of the number.

These are some of the ways you can get the type of a property in a JavaScript interface. Depending on your specific use case, one method may be more appropriate than another.