function throttle(fn,time) {
let last;
return function() {
let now = Date.now();
if (!last) {
fn.apply(this,arguments);
last = now;
return;
}
if(now - last >= time) {
fn.apply(this,arguments);
last = now;
}
}
}
// m = throttle(b,1000)
// m(1)
// m(2)
// m(3)
// setTimeout(function(){m(4)},1000)
function debounce(fn,time) {
let timer
return function() {
let args = arguments;
if(timer) {
clearTimeout(timer);
timer = null
}
setTimeout(function() {
fn.apply(this,args)
timer = null;
},time)
}
}
