How To Use A Constant For A Class Name In Javascript

This works since classes are constructor functions, which are objects. This also means we can use the Object.freeze method on Example to make the Example class immutable. So we can log the values of the Example.constant1 and Example.constant2 properties and get their values. We should see 3 and 2 respectively. Conclusion

Constant Objects and Arrays. The keyword const is a little misleading. It does not define a constant value. It defines a constant reference to a value. Because of this you can NOT Reassign a constant value Reassign a constant array Reassign a constant object But you CAN Change the elements of constant array Change the properties of

The const declaration creates an immutable reference to a value. It does not mean the value it holds is immutable just that the variable identifier cannot be reassigned. For instance, in the case where the content is an object, this means the object's contents e.g., its properties can be altered. You should understand const declarations as quotcreate a variable whose identity remains

Block Scope Like let, const is block-scoped, making it safer to use inside blocks. Signal Intent Using const indicates that the variable should not change, providing more clarity and reducing bugs. Syntax const variableName value variableName The name of the constant variable. value The initial value assigned to the variable.

Summary in this tutorial, you'll learn how to define constants by using the JavaScript const keyword.. Introduction to the JavaScript const keyword. ES6 provides a new way of declaring a constant by using the const keyword. The const keyword creates a read-only reference to a value.. const CONSTANT_NAME value Code language JavaScript javascript. By convention, the constant identifiers

while the above cleverly adds a constant property to a class, the actual value for the constant is quotoutsidequot the class definition quotquot, which really violates one of the definitions of encapsulation. I guess it is sufficient to just define a constant property quotinsidequot the class and there is no need for the get in this case. -

However, there must be a more elegant and optimal way to declare constants in ES6 classes. What options are available that go beyond manipulating prototypes, which is often discouraged? Solutions Solution 1 Using Static Getters. One of the recommended approaches involves using static getters. This allows you to access the constants without

Understanding the Const Keyword. The const keyword in JavaScript is used to declare constants - variables whose values cannot be reassigned once they are initialized. This immutability brings a new level of predictability and safety to your code, helping to prevent accidental reassignments and potential bugs.

Define a const in the class constructor ES6 You use static read-only properties to declare constant values that are scoped to a class. class Foo static get BAR return 42 console.logFoo.BAR print 42. Foo.BAR 43 triggers an error