连乘函数

function sum(x){

if(window.timer){

clearTimeout(window.timer)

}

const temp =(y)=>{

return sum(x*y)

}

temp.result = ()=>x

window.timer = setTimeout(()=>{

console.log(temp.result())

})

return temp

}

sum(1)(2)(5) //======>10

sum(5)(10)(2)//======>100

sum(2)(3)(4)(5)// =====>120