Typescript TS2339 Property doesn't exist on type - Class decleration

Question

I am using exact example outlined in Typescript https://www.typescriptlang.org/docs/handbook/typescript-in-5-minutes.html#classes

This is exact copy I am running in app

Answer 1

You are declaring some public properties of your class directly in the consctructor so you should use "this" keyword

class Student {
    fullName: string;
    constructor(public firstName, public middleInitial, public lastName) {
        this.fullName = this.firstName + " " + this.middleInitial + " " + this.lastName;
    }
}

Edit : working fiddle