@antongolub/repeater

Helper for creating auto-calling functions

Motivation

The wheel was invented a long time ago: repeat. What's the diff?

• Repeater stores the last call params and uses them for next invocations.
• Inherits target's iface.
• Allows to combine manual and automated calls.

Usage

import repeater from '@antongolub/repeater'
    
    const target = step => { this.i += step }
    const context = { i: 0 }
    const delay = 1000
    const rep = repeater(target, delay, context)
    
    rep(2)
    
    // Imagine, 5 seconds later new 'manual' call occurs
    setTimeout(() => rep(1), 5000)

    // ~10 seconds after start: 
    setTimeout(() => console.log(context.i), 10000) // 15

Repeater is just a wrapper around the target function. It exposes several util props:

Prop	Description
delay	interval in ms
timeout	TimeoutID
target	ref for original target function
context	optional scope
limit	optional remainder of calls
args	arguments of the last invocation

So, anytime you're let to interrupt the repetitive call by clearing timeout:

clearTimeout(rep.timeout)

Parametrization

const rep1 = repeater(target, delay, context, limit)
    const rep2 = repeater({target, delay, context, limit})

License

MIT