DefaultParametersNotMutateArgs [rule] v0.1.0

Express defaults in the parameter list with =. Do not patch missing values inside the body with reassignment, ||, or by writing into arguments. Default-parameter syntax keeps the function signature self-documenting and makes the default value visible at the call boundary.

Checks

• Defaults are written function fn(x = 0, y = []) { … }, not if (x === undefined) x = 0.
• No reads of or writes to the arguments object — use rest parameters instead: function fn(...args).
• Default-valued parameters come last in the signature so callers can omit them positionally.
• Default expressions are not side-effectful; they evaluate per call.

Label

Use ES6 default parameters; never mutate the arguments object

DefaultParametersNotMutateArgs [rule] v0.1.0

Express defaults in the parameter list with =. Do not patch missing values inside the body with reassignment, ||, or by writing into arguments. Default-parameter syntax keeps the function signature self-documenting and makes the default value visible at the call boundary.

Checks

• Defaults are written function fn(x = 0, y = []) { … }, not if (x === undefined) x = 0.
• No reads of or writes to the arguments object — use rest parameters instead: function fn(...args).
• Default-valued parameters come last in the signature so callers can omit them positionally.
• Default expressions are not side-effectful; they evaluate per call.

Label

Use ES6 default parameters; never mutate the arguments object

Label

Use ES6 default parameters; never mutate the arguments object