(fn)
| 57 | * @returns {(event: Event, ...args: unknown[]) => void} |
| 58 | */ |
| 59 | export function once(fn) { |
| 60 | var ran = false; |
| 61 | |
| 62 | return function (...args) { |
| 63 | if (ran) return; |
| 64 | ran = true; |
| 65 | |
| 66 | // @ts-ignore |
| 67 | return fn?.apply(this, args); |
| 68 | }; |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Substitute for the `stopImmediatePropagation` event modifier |