The prototype of a subclass is the superclass

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2. Decorators-basics-in-angular A Decorator is a special kind of declaration that can be attached to a class declaration, method, accessor, property, or parameter. Decorators use the form @expression, where expression must evaluate to a function that will be called at runtime with information about the decorated declaration. For example, given the decorator @sealed we might write the sealed function […]...
3. Class Inheritance Instances inherit from classes (like a blueprint — a description of the class), and create sub-class relationships: hierarchical class taxonomies. Instances are typically instantiated via constructor functions with the new keyword. Class inheritance may or may not use the class keyword from ES6. Prototypal Inheritance: Instances inherit directly from other objects. Instances are typically instantiated via factory […]...
4. How To Create a Property Decorator With a property decorator, you can change the value that is in a property at runtime. The property decorator is declared before the property declaration. It cannot be used in a declaration file or used in combination with a declare statement. The property decorators can change the value that comes out of the class properties. […]...
5. Method-in-Typescript They are part of good old Javascript. Accessor properties are represented by “getter” and “setter” methods. In an object literal they are denoted by get and set: let obj = { get propName() { // getter, the code executed on getting obj.propName }, set propName(value) { // setter, the code executed on setting obj.propName = […]...
6. Typescript Class Typescript allows for non-method properties, similar to this Stage 3 proposal. In fact, declaration of each instance method or property that will be used by the class is mandatory, as this will be used to build up a type for the value of this within the class. So, adding non-method properties to classes in TypeScript is encouraged […]...
7. Difference between ngOnChanges and ngOnInit First a quick review of the main lifecycle hooks for components and directives constructor : It is invoked when a component or directive is created by calling new on the class. ngOnChanges : It is invoked whenever there is a change or update in any of the @Input() properties of the component. ngOnInit : It is invoked every time a […]...
8. Integrating with DOM Manipulation Plugins React can be used in any web application. It can be embedded in other applications and, with a little care, other applications can be embedded in React. This guide will examine some of the more common use cases, focusing on integration with jQuery and Backbone, but the same ideas can be applied to integrating components with any existing […]...
9. NgOnInit A class constructor in Angular is mostly used to inject dependencies. Angular calls this constructor injection pattern. The Constructor is a default method of the class that is executed when the class is instantiated and ensures proper initialisation of fields in the class and its subclasses. It has nothing to do with Angular2. Angular, or […]...
10. Difference between the methods .pipe() and .subscribe() on a RXJS observable subscribe is not a regular operator, but a method that calls Observable’s internal subscribe function. It might be for example a function that you passed to Observable’s constructor, but most of the time it is a library implementation, which defines what will be emitted by an Observable, and when it be will emitted. This means that calling subscribe is actually […]...