Worth noting that "cognitive complexity" may mean SonarQube metric – a metric that is not widely recognized by industry, created by SonarQube employee as (imho

Worth noting that "cognitive complexity" may mean SonarQube metric – a metric that is not widely recognized by industry, created by SonarQube employee as (imho failed) attempt to address "issues" with "cyclomatic complexity" (principled, intdustry recognised metric). It'll count things like nullish coalescing and optional chaning as +1 on your complexity which makes it unusable with jsx or ts code. With low thresholds ("clean code" like low) both LoC and "cognitive complexity" (as in SQ) are bad measures that lit up in red large percentage of otherwise correct code in complex projects. The way people usually "solve" them is through naive copy pasting which doesn't reduce any cognitive load - it just scatters complexity around making it harder to reason about and modify in the future.