Static Properties in JavaScript

Static properties in JavaScript belong to the class itself rather than its instances. They can be accessed directly on the class without creating objects, making them useful for storing class-level data like constants or shared values.

Syntax

// Function constructor approach
function ClassName(params) {
    // instance properties
}
ClassName.staticProperty = value;

// ES6 class approach
class ClassName {
    static staticProperty = value;
}

Example: Static Properties with Function Constructor

Example: Static Properties with ES6 Classes

Comparison: Static vs Instance Properties

Common Use Cases

Key Points

• Static properties belong to the class, not instances
• Accessed using ClassName.property syntax
• Useful for constants, counters, and shared data
• Memory efficient - only one copy exists
• Cannot be accessed through instance objects

Conclusion

Static properties provide a way to store class-level data that is shared across all instances. They are perfect for constants, utility values, and maintaining class-wide state like counters.