no-array-mutation.md

no-array-mutation

Disallow mutating array methods.

Rule Details

Property	Value
Type	suggestion
Fixable	No
Recommended	warn
Strict	error

Rationale

Mutating arrays in place creates hidden side effects. Immutable array operations make behavior easier to reason about and safer to refactor.

Examples

✅ Correct

const next = [...items, value];

❌ Incorrect

items.push(value);

Configuration

'zero-tolerance/no-array-mutation': 'error'