no-unsafe-subject-next.md

Avoid passing undefined to next (no-unsafe-subject-next)

This rule effects failures if next is called without an argument and the subject's value type is not void.

In RxJS version 6, the next method's value parameter is optional, but a value should always be specified for subjects with non-void element types.

Rule details

Examples of incorrect code for this rule:

const subject = new Subject<number>();
subject.next();

Examples of correct code for this rule:

const subject = new Subject<void>();
subject.next();

const subject = new Subject<number>();
subject.next(0);

Options

This rule has no options.