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An ES6 implementation of the debounce function. "Debouncing enforces that a function not be called again until a certain amount of time has passed without it being called. As in 'execute this function only if 100 milliseconds have passed without it being called.'" - CSS-Tricks (https://css-tricks.com/the-difference-between-throttling-and-debounc…
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| function debounce(callback, wait, immediate = false) { | |
| let timeout = null | |
| return function() { | |
| const callNow = immediate && !timeout | |
| const next = () => callback.apply(this, arguments) | |
| clearTimeout(timeout) | |
| timeout = setTimeout(next, wait) | |
| if (callNow) { | |
| next() | |
| } | |
| } | |
| } | |
| /** | |
| * Normal event | |
| * event | | | | |
| * time ---------------- | |
| * callback | | | | |
| * | |
| * Call log only when it's been 100ms since the last sroll | |
| * scroll | | | | |
| * time ---------------- | |
| * callback | | | |
| * |100| |100| | |
| */ | |
| const handleScroll = debounce((arg, event) => { | |
| console.log(`${arg} ${event.type}`) | |
| }, 100, true) | |
| window.addEventListener('scroll', (event) => { | |
| handleScroll('Event is:', event) | |
| }) |
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