ele.timer = setInterval() 这种格式命名的定时器是啥意思？ele.timer就这个，ele是某个元素

Question

ele.timer = setInterval (() => {

            let nowTime = +new Date()
            let timeDifference = Math.min(nowTime - startTime,duration)     
            for (let attr in options) {                
                let result = start[attr] + range[attr] / duration * timeDifference
                ele.style[attr] = result + 'px'
            }
            if (timeDifference === duration) {
                clearInterval(ele.timer)
                fn && fn()
            }


        }, 10)

Answer 1

可能是页面有多个ele类似的元素，需要多个定时器，这样写为了方便查找哪个元素对应哪个定时器
如果只有个一个就可以不必这样写，直接将timer作为全局变量就行了