A catch clause that only rethrows the caught exception has the same effect as omitting the catch altogether and letting
it bubble up automatically.
try {
  doSomething();
} catch (ex) {  // Noncompliant
  throw ex;
}
Such clauses should either be removed or populated with the appropriate logic.
doSomething();
or
try {
  doSomething();
} catch (ex) {
  console.err(ex);
  throw ex;
}