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david
answered Apr 24 '23 00:00
In JavaScript, you can create static variables by using the static keyword in a class declaration. The static keyword indicates that a variable or method belongs to the class itself, rather than to an instance of the class.
Here's an example:
class Car {
static numberOfWheels = 4;
constructor(make, model) {
this.make = make;
this.model = model;
}
}
console.log(Car.numberOfWheels); // outputs: 4
const myCar = new Car('Toyota', 'Camry');
console.log(myCar.numberOfWheels); // outputs: undefined
In this example, we define a Car class with a numberOfWheels static variable set to 4 . We can access this static variable using the class name Car . When we create a new instance of the Car class with the new keyword, the numberOfWheels variable is not available on the instance [b] mycar , because it belongs to the class itself. [/b]
It's important to keep in mind that not all versions of JavaScript support static variables and methods, particularly older versions. Therefore, you may need to use a different approach to achieve similar functionality if you need to support older browsers or platforms.