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index.js
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index.js
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/**
* @description - Scheudles `func` to run every `frequencyInMs` milliseconds
* @param {Function} func - The function to run
* @param {Number} frequencyInMs - The number of milliseconds between calls
*/
module.exports = function periodically(func, frequencyInMs) {
var running = false
/**
* @description - Runs the function and schedules another run upon
* completion
*/
function tick() {
return Promise.resolve(func()).then(function() {
if (running) {
setTimeout(tick, frequencyInMs)
}
return null
})
}
/**
* @description - Starts the periodic thing
*/
function start() {
if (!running) {
running = true
tick()
}
return null
}
/**
* @description - Stops the periodic thing
*/
function stop() {
running = false
}
return { start: start, stop: stop }
}