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JavaScript Classes are templates for JavaScript Objects. JavaScript Class Syntax. Use the keyword class to create a class. Always add a method named constructor(): Syntax. class ClassName { constructor () { ... } Example. class Car { constructor (name, year) { this.name = name; this.year = year; } The example above creates a class named "Car".
A class is a type of object template. The class statement initiates a JavaScript class. Properties and methods are assigned in the constructor() method. The constructor() method is called each time a class object is initialized.
10 mar 2024 · 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 unique to classes. For more examples and explanations, see the Using classes guide.
In JavaScript, classes are mainly an abstraction over the existing prototypical inheritance mechanism — all patterns are convertible to prototype-based inheritance. Classes themselves are normal JavaScript values as well, and have their own prototype chains.
28 wrz 2016 · Using a Class: var obj = new ns.MyClass(); Using the Function: ns.myFunction(); If you construct the object without new, this will point to the namespace, so the namespace will be "destroyed" because MyClass.class_property and MyClass.class_method will be added to it.
12 wrz 2023 · The class declaration creates a binding of a new class to a given name. You can also define classes using the class expression.
Defining a Class in JavaScript. A class in JavaScript is defined using the class keyword, followed by the class name and a pair of curly braces. Here is the basic structure:
