Claim based Authorization (Skipping the subject argument)

Question

In the docs it shows that you can skip the subject and specify just the action but each time I do that, I get an error asking for subject. How can I implement claim based authorization without supplying the subject?

import { Ability } from '@casl/ability';

export default new Ability([
  {
    action: 'read',
  }
]);

Property 'subject' is missing in type '{ action: string; }' but required in type 'SubjectRawRule<string, ExtractSubjectType, MongoQuery>'.ts(2741)

In the docs, it shows the rawRule interface showing subject as an optional parameter:

  interface RawRule {
  action: string | string[]
  subject?: string | string[]
  /** an array of fields to which user has (or not) access */
  fields?: string[]
  /** an object of conditions which restricts the rule scope */
  conditions?: any
  /** indicates whether rule allows or forbids something */
  inverted?: boolean
  /** message which explains why rule is forbidden */
  reason?: string
}