学习记录_0921

常用函数

https://juejin.im/post/6873513007037546510

一、防抖

function debounce(func,ms = 500){
	let timer
	return function(...arges) {
		if(timer) {
			clearTimeout(timer)
		}
		timer = setTimeout( () => {
			func.apply(this,args)
		},ms)
	}
}

二、节流

function throttle(func,ms) {
	let canRun = true
	return function(...args) {
		if(!canRun) return
		canRun = false;
		setTimeout( () => {
			func.apply(this,args)
			canRun = true
		},ms)
	}
}

三、new

function myNew(Func) {
	const instance = {}
	if(Func.prototype){
		Object.setPrototypeOf(instance,Func.prototype)
	}
	const res = Func.apply(instance,[].slice.call(arguments,1))
	if(typeof res === 'function' || (typeof res === "object" && res !== null)){
		return res
	}
	return instance
}

四、bind
待添加