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Software Design Principles: Build Maintainable Applications

Software design principles help you organize responsibilities and dependencies so an application can change safely. This guide explains cohesion, coupling and separation of concerns, then uses an ord

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Technical Debt in Software: Examples, Prioritization and Reduction

Technical debt describes design and implementation choices that increase the cost or risk of future software changes. This guide helps you recognize concrete examples, record evidence in a debt regis

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Code Readability Best Practices: Write Code Developers Can Understand

Code readability best practices help another developer explain a function's purpose, decisions and side effects without guessing. This guide uses JavaScript examples to improve names, simplify contro

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Writing Testable Code: Practical JavaScript Examples and Test Boundaries

Writing testable code means making important behavior observable while controlling the inputs and dependencies that affect it. This guide uses JavaScript examples to separate business rules from effe

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SOLID Principles Explained with Practical JavaScript Examples

The SOLID principles describe five ways to manage responsibility, extension, substitution, interfaces and dependency direction in software. This guide uses JavaScript examples to explain each princip

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Refactoring Code Safely: A Practical Guide for Existing Software

Refactoring code improves its internal structure while preserving observable behavior. This guide shows how to choose a useful cleanup target, establish a safety net and make small JavaScript changes

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