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Debounce a function (Typescript)
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| type Fn = (...args: any[]) => any; | |
| type Callback<F extends Fn> = F extends Fn | |
| ? (...args: Parameters<F>) => ReturnType<F> | |
| : never; | |
| function debounce<T extends Fn, O extends Callback<T>>( | |
| func: O, | |
| wait: number, | |
| immediate?: boolean | |
| ): O { | |
| let timeout: NodeJS.Timeout, result: ReturnType<O>; | |
| return function (...args) { | |
| clearTimeout(timeout); | |
| timeout = setTimeout(() => { | |
| timeout = null; | |
| if (!immediate) { | |
| result = func.call(this, ...args); | |
| } | |
| }, wait); | |
| if (immediate && !timeout) { | |
| result = func.call(this, ...args); | |
| } | |
| return result; | |
| } as O; | |
| } |
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