| 1 | export function debounce (callback: () => void, wait: number = 100): () => void { |
| 2 | let timeout: ReturnType<typeof setTimeout> |
| 3 | let start: number | undefined |
| 4 | |
| 5 | return (): void => { |
| 6 | if (start == null) { |
| 7 | start = Date.now() |
| 8 | } |
| 9 | |
| 10 | if (timeout != null && Date.now() - start > wait) { |
| 11 | clearTimeout(timeout) |
| 12 | start = undefined |
| 13 | callback() |
| 14 | return |
| 15 | } |
| 16 | |
| 17 | clearTimeout(timeout) |
| 18 | timeout = setTimeout(() => { |
| 19 | start = undefined |
| 20 | callback() |
| 21 | }, wait) |
| 22 | } |
| 23 | } |