It is considered good practice to only throw the Error object itself or an object using the Error object as base objects for user-defined exceptions. The benefit of Error objects is that they automatically keep track of where they were built and originated. This rule restricts what can be thrown as an exception.

Bad Practice

throw "error";

throw 0;

throw undefined;

throw null;

var err = new Error();
throw "an " + err;
// err is recast to a string literal

var err = new Error();
throw `${err}`

Recommended

throw new Error();

throw new Error("error");

var e = new Error("error");
throw e;

try {
    throw new Error("error");
} catch (e) {
    throw e;
}

blurt / blurt

No ignore rules found