debounce#

import { debounce } from 'funtool';

// 基本用法
const debouncedLog = debounce((message) => {
  console.log(message);
}, 300);

debouncedLog('Hello'); // 仅在 300 毫秒无操作后才会记录日志

// 带 this 上下文
const obj = {
  prefix: 'Log: ',
  log: debounce(function(msg) {
    console.log(this.prefix + msg);
  }, 200)
};
obj.log('Test'); // 输出: Log: Test

// 控制方法
const fn = debounce(() => console.log('Done'), 500);
fn();
fn.cancel(); // 取消待执行的调用
fn.flush(); // 立即执行
fn.pending(); // 检查是否有待执行的调用

type Debounced<T extends (...args: any[]) => any, This = any> = {
	(this: This, ...args: Parameters<T>): Promise<ReturnType<T> | undefined>
	cancel: () => void
	flush: () => Promise<ReturnType<T> | undefined>
	pending: () => boolean
}

function debounce<T extends (...args: any[]) => any, This = any>(
  fn: T,
  delay?: number
): Debounced<T, This>