no-use-of-empty-return-value

If a function does not return anything, it makes no sense to use its output. Specifically, passing it to another function, or assigning its "result" to a variable is probably a bug because such functions return undefined, which is probably not what was intended.

Noncompliant Code Example

function foo() {
  console.log('Hello, World!');
}

a = foo();

Compliant Solution

function foo() {
  console.log('Hello, World!');
}

foo();