It’s A “Bad” Part Because:
What is the difference between private protected and public?
If the class member declared as public then it can be accessed everywhere. If the class members declared as protected then it can be accessed only within the class itself and by inheriting child classes. If the class members declared as private then it may only be accessed by the class that defines the member.
A private function can only be used inside of it’s parent function or module. A public function can be used inside or outside of it. Public functions can call private functions inside them, however, since they typically share the same scope.
There is no reserved keyword for private . You can simply use it as a variable. const private = ‘private’; private. jsprivate is not a reserved keyword, I can set it to anything.
When you should not use arrow functions?
4) Functions that use the arguments object
Arrow functions don’t have the arguments object. Therefore, if you have a function that use arguments object, you cannot use the arrow function.
Classes are a template for creating objects. They encapsulate data with code to work on that data. Classes in JS are built on prototypes but also have some syntax and semantics that are not shared with ES5 class-like semantics.
You can’t have multiple constructors, but you can use destructuring and default values to do what you want. … And you can do this if you want to support a ‘parameterless’ constructor.
A class is a blueprint for creating objects. We define what properties and methods an object should have, which taken together are considered a type, and then instantiate many objects using that blueprint. Perhaps a more visual analogy is that a class acts as an object creation factory.
Should you use classes in TypeScript?
When should you use types in TypeScript? Unlike classes, types do not express functionality or logic inside your application. It’s best to use types when you want to describe some form of information. They can describe varying shapes of data, ranging from simple constructs like strings, arrays, and objects.