When the names of arguments in a function call match the names of the function parameters, it contributes to clearer, more readable code. However, when the names match, but are passed in a different order than the function parameters, it indicates a mistake in the parameter order which will likely lead to unexpected results.

Noncompliant Code Example

function divide(divisor, dividend) {
  return divisor/dividend;
}

function doTheThing() {
  var divisor = 15;
  var dividend = 5;

  var result = divide(dividend, divisor);  // Noncompliant; operation succeeds, but result is unexpected
  //...
}

Compliant Solution

function divide(divisor, dividend) {
  return divisor/dividend;
}

function doTheThing() {
  var divisor = 15;
  var dividend = 5;

  var result = divide(divisor, dividend);
  //...
}

Exceptions

Swapped arguments that are compared beforehand in an enclosing if-statement are ignored:

function divide(divisor, dividend) {
  return divisor/dividend;
}

function doTheThing() {
  var divisor = 15;
  var dividend = 5;
  if (divisor > dividend) {
    var result = divide(dividend, divisor);
    //...
  }
}