37 lines
903 B
JavaScript
37 lines
903 B
JavaScript
|
|
const now = Date.now || function() {
|
|
return new Date().getTime();
|
|
};
|
|
|
|
export function debounce(func, wait, immediate) {
|
|
var timeout, args, context, timestamp, result;
|
|
|
|
var later = function() {
|
|
var last = now() - timestamp;
|
|
|
|
if (last < wait && last >= 0) {
|
|
timeout = setTimeout(later, wait - last);
|
|
} else {
|
|
timeout = null;
|
|
if (!immediate) {
|
|
result = func.apply(context, args);
|
|
if (!timeout) context = args = null;
|
|
}
|
|
}
|
|
};
|
|
|
|
return function() {
|
|
context = this;
|
|
args = arguments;
|
|
timestamp = now();
|
|
var callNow = immediate && !timeout;
|
|
if (!timeout) timeout = setTimeout(later, wait);
|
|
if (callNow) {
|
|
result = func.apply(context, args);
|
|
context = args = null;
|
|
}
|
|
|
|
return result;
|
|
};
|
|
}
|