Anti-shake and throttling

//Anti-shake 
/* 
* Idea: When the scroll bar is scrolling, trigger the scroll event, here is set to execute the method once 
in 5 milliseconds * If the event is triggered again in these 5 milliseconds, the last call 
* debounce method will be deleted , delete the last call first, and then execute setTimeout 
* The function of anti-shake ensures that the scroll event must be executed once at an interval of more than 5 milliseconds 
. * */ 
window.onscroll=function () { 
    //lazyload() 
    debounce(lazyload,window ) 
} 
function debounce(method,context) { 
    clearTimeout(method.timeout) 
    method.timeout = setTimeout(()=>{ 
        method.call(context) 
    },500) 
} 
function lazyload () { 
    console.log('onscroll' ) 
} 

throttling

function lazyload () {
    console.log('onscroll')
}

var canCel = true
window.onscroll = function () {
    if (!canCel) {
        return
    }
    canCel = false
    setTimeout(()=>{
        throttle(lazyload,window)
        canCel = true
    },500)
}
function throttle(method,context) {
    method.call(context)
}