noDuplicateParameters (since v0.9.0)
This rule is recommended by Rome.
Disallow duplicate function arguments name.
Examples
Invalid
var f = function(a, b, b) {}suspicious/noDuplicateParameters.js:1:24 lint/suspicious/noDuplicateParameters ━━━━━━━━━━━━━━━━━━━━━
✖ Duplicate argument name
> 1 │ var f = function(a, b, b) {}
│ ^
2 │
function b(a, b, b) {}suspicious/noDuplicateParameters.js:1:18 lint/suspicious/noDuplicateParameters ━━━━━━━━━━━━━━━━━━━━━
✖ Duplicate argument name
> 1 │ function b(a, b, b) {}
│ ^
2 │
Valid
function i(i, b, c) {}
var j = function (j, b, c) {};
function k({ k, b }, { c, d }) {}
function l([, l]) {}
function foo([[a, b], [c, d]]) {}