Anti-Patterns

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Anti-pattern indicating need for refactoring

Code smell indicating the dangerous use of globally accessible mutable data

Code smell indicating modules trading data in excessive secret ways (updated from Inappropriate Intimacy)

Code smell indicating program elements that are not earning their keep (updated from Lazy Class)

Code smell indicating imperative loops that could be replaced with pipeline operations

Code smell indicating overuse of mutable state that makes reasoning about code difficult

Code smell indicating names that fail to communicate intent clearly

Code smell indicating repeated switch/case logic across the codebase (updated terminology from Switch Statements)

Anti-patterns related to build and development environment setup that create friction and complexity in the development process.

Anti-patterns related to function design including too many arguments, output arguments, flag arguments, and dead functions.

General code smells covering duplication, abstraction levels, dependencies, dead code, inconsistency, and other fundamental anti-patterns.

Anti-patterns related to naming that reduce code readability, searchability, and expressiveness.

Anti-patterns in test code that reduce test effectiveness, maintainability, and reliability.

Anti-pattern of relying on accidental behavior without understanding why code works

Anti-pattern where a component's initial render reads browser-only APIs (localStorage/sessionStorage/window/document/matchMedia) or render-time values (Date.now, new Date, Math.random, unzoned toLocale*) so server and client first-render disagree, breaking hydration.