Unlike strongly typed languages, JavaScript does not enforce a return type on a function. This means that different paths through a function can
return different types of values, which can be very confusing to the user and significantly harder to maintain.
Noncompliant Code Example
function foo(a) { // Noncompliant
if (a === 1) {
return true;
}
return 3;
}
Compliant Solution
function foo(a) {
if (a === 1) {
return true;
}
return false;
}
Exceptions
Functions returning this are ignored.
function foo() {
// ...
return this;
}
Functions returning expressions having type any are ignored.
