Supported Lint Rules

This list is auto-generated from our sources.

Rules are organized by severity.

• INFO
• WARNING
• ERROR

In addition, rules can be further distinguished by maturity. Unqualified rules are considered stable, while others may be marked experimental to indicate that they are under review. Lints that are marked as deprecated should not be used and are subject to removal in future Linter releases.

These rules are under active development. Feedback is welcome!

Errors

Something is malformed in your component boilerplate.

Props can't be cascaded after unparenthesized arrow functions.

Verifies the list of dependencies for React Hooks like useEffect and similar.

Do not use unsupported types as component children.

Do not return unsupported types from the render method.

Never reference instance members within ReactJS "static" lifecycle methods.

Enforces the Rules of Hooks

Do not use string CSS property values without specifying a unit.

Warnings

Avoid setting a link target without rel="noopener noreferrer".

Something is not quite right in your component boilerplate.

Prefer useRef over createRef within a function component.

Avoid setting the same prop more than once on a component builder.

Avoid forwarding custom props to a Dom builder.

Avoid deriving React keys from hashCode since it is not unique.

Avoid setting props that map to invalid HTML element attributes.

Always provide required props.

Avoid deriving React keys from objects that have a high chance of colliding.

Syntax errors around cascades

Avoid placing elements within iterators without setting props.key to a unique value.

Use of non defaulted props in function components

Avoid deriving React keys from toString() since it is not unique.

Avoid throwing errors within propTypes.

Avoid deriving React keys from an object typed as dynamic/Object.

Do not unsafely access required props when they're not guaranteed to be present.

Hints

Always provide required props.

Internal tool for debugging boilerplate parsing / building.

Name boolean props in a way that makes them easy to read and infer their purpose.

Avoid using list literals to define consumed prop keys.

Place documentation comments above component factories.

Avoid returning false from the render method.

Avoid using callback refs to assign ref field values.

Avoid using deprecated string refs.

Avoid using keys when not necessary.

Prefer passing children as arguments instead of wrapping them in Iterables.