Unchecked map or dictionary key access

#Metadata

Rule ID

ts.correctness.unchecked-map-key-access

Severity

medium

Confidence

0.8

Languages

javascript, typescript

Presets

recommended, strict

Stability

stable

Applies to

block

Tags

correctness, crq-cor-003, data-access, rules-catalog

#Why it matters

Missing-key reads often flow undefined deeper into the function and fail far away from the original lookup.

#Remediation

Check `has`, `in`, or `Object.hasOwn` before reading, or provide a safe default when the key is missing.

#Repository path

The generated metadata points to critiq-rules/libs/rules/catalog/rules/typescript/ts.correctness.unchecked-map-key-access.rule.yaml.