Duplicate Condition Branches (ARCH3190)

Key typescript.quality.duplicate-branches · Severity warning · Category quality

Branches with textually identical bodies mean redundant branching; this either hides a logic error or means the branches can be merged. Duplicated conditions are also confusing.

Incorrect

function label(s: Status): string {
  if (s === "active") return "Active";
  else if (s === "pending") return "Active";
  else return "Inactive";
}

Correct

function label(s: Status): string {
  if (s === "active" || s === "pending") return "Active";
  return "Inactive";
}

Fix

Merge branches that produce the same result into one condition, or fix the incorrect condition.