time

import { time } from 'patronum';
// or
import { time } from 'patronum/time';

time(clock)

since

patronum 2.1.0 Use time({ clock }) with patronum < 2.1.0

Motivation

The method allow to read current time and write it to store

Formulae

$time = time(clock);

• Initialize $time with Date.now()
• When clock is triggered, call Date.now() to update $time with results

Arguments

1. clock: Event<any> | Effect<any, any, any> | Store<any> — The unit triggers time reading and updates $time store

— Time is a generic type argument used for overriding time reader function. By default, it is number

Returns

$time: Store<Time> — Store contains unix timestamp snapshot, updates when clock triggers. Initialized with Date.now()

Example

import { time } from 'patronum';

const tick = createEvent();
const $time = time(tick);

$time.watch((time) => console.log('time', time));
// => time 1660293358847

tick();
// => time 1660293358848
await new Promise((res) => setTimeout(res, 100));
tick();
// => 1660293358952

Try it

time({clock, getNow, initial})

since

patronum 1.7.0

Motivation

The method allow to read current time and write it to store. Object form allows to use additional parameters: getNow and initial

Formulae

$time = time({ clock, getNow, initial });

• Initialize $time with initial, if not present call getNow, if not present call Date.now()
• When clock is triggered, call getNow to update $time with results, if not present use Date.now()

Arguments

1. clock: Event<any> | Effect<any, any, any> | Store<any> — The unit triggers time reading and updates $time store
2. getNow: () => Time — Optional. A custom function to read time when clock triggers. Must be synchronous.
3. initial: Time — Optional. Initial state for $time store. If not passed getNow is called.

— Time is a generic type argument used for overriding time reader function. By default, it is number

Returns

$time: Store<Time> — Store contains unix timestamp snapshot, updates when clock triggers. If getNow is overridden, contains value this function returns. By default, it is number. Initialized with initial, by default, it is Date.now()

Example

import { time } from 'patronum';

const tick = createEvent();
const $time = time({ clock: tick });

$time.watch((time) => console.log('time', time));
// => time 1660293358847

tick();
// => time 1660293358848
await new Promise((res) => setTimeout(res, 100));
tick();
// => 1660293358952

Try it