Anti-shake and throttling

Image stabilization function

function debounce (fn, wait) {

var timeout = null;

return function() {

if(timeout !== null) clearTimeout(timeout);

timeout = setTimeout(fn, wait);

} }

Throttling function

function throttle(fn, wait) { var valid = true; return function () { if(! valid){ return false; } valid = false; setTimeout(()=>{fn(); valid=true}, wait); }}