Computed Properties

Computed properties are a programming concept where a property's value is derived dynamically from other data, rather than being stored directly. They are commonly used in frameworks and libraries to create reactive or derived data that updates automatically when its dependencies change. This pattern helps keep code declarative, efficient, and maintainable by avoiding manual recalculations.

Also known as: Computed, Derived Properties, Reactive Properties, Getters, Calculated Properties

Why learn Computed Properties?

Developers should use computed properties when building applications with reactive data flows, such as in frontend frameworks like Vue.js or React (via hooks), to handle derived state that depends on other variables. They are essential for performance optimization, as they cache results and only recompute when necessary, and improve code readability by encapsulating complex logic into simple property access. Use cases include formatting data for display, filtering lists, or calculating totals based on user inputs.

Learning Resources

• docs: Vue.js Guide: Computed Properties
• docs: MDN Web Docs: Getters
• docs: React Docs: useMemo Hook
• tutorial: Computed Properties in JavaScript - Tutorial
• course: Vue Mastery Course: Reactivity Fundamentals