prefer-logical-operator-over-ternary.md

prefer-logical-operator-over-ternary

📝 Prefer using a logical operator over a ternary.

💼 This rule is enabled in the following configs: ✅ recommended, ☑️ unopinionated.

💡 This rule is manually fixable by editor suggestions.

Disallow ternary operators when simpler logical operator alternatives exist.

Ideally, most reported cases have an equivalent Logical OR(||) expression. The rule intentionally provides suggestions instead of auto-fixes, because in many cases, the nullish coalescing operator (??) should be preferred.

Examples

// ❌
foo ? foo : bar;

// ✅
foo ?? bar;

// ✅
foo || bar;

// ❌
foo.bar ? foo.bar : foo.baz

// ✅
foo.bar ?? foo.baz

// ❌
foo?.bar ? foo.bar : baz

// ✅
foo?.bar ?? baz

// ❌
!bar ? foo : bar;

// ✅
bar ?? foo;

// ✅
foo ? bar : baz;