DefinitelyTyped/types/rbac-a/rbac-a-tests.ts

import {
    Provider,
    RBAC,
} from "rbac-a";

class CustomProvider extends Provider { }

const rbac = new RBAC({
    provider: new CustomProvider()
});

const user = "ExampleUser";

rbac.on('error', (err) => {
    console.error('Error while checking $s/%s', err.role, err.user);
    console.error(err.stack);
});

rbac.check(user, 'create').then((allowed) => {
    if (allowed) {
        console.log('User can create!');
    } else {
        console.log('User cannot create.');
        console.info('Please contact your system admin for more information');
    }
}).catch((err) => {
    console.error(err && err.stack || err || 'ERROR');
});

// specify attributes arguments
rbac.check(user, 'edit', { time: Date.now() }).then((allowed) => {
    if (allowed) {
        console.log('User can edit!');
    } else {
        console.log('User cannot edit.');
        console.info('Please contact your system admin for more information');
    }
}).catch((err) => {
    console.error(err && err.stack || err || 'ERROR');
});