@antv/util
Version:
> AntV 底层依赖的工具库，不建议在自己业务中使用。
42 lines • 1.28 kB
JavaScript
export default (function (func, wait, options) {
var timeout, context, args, result;
var previous = 0;
if (!options)
options = {};
var later = function () {
previous = options.leading === false ? 0 : Date.now();
timeout = null;
result = func.apply(context, args);
if (!timeout)
context = args = null;
};
var throttled = function () {
var now = Date.now();
if (!previous && options.leading === false)
previous = now;
var remaining = wait - (now - previous);
context = this;
args = arguments;
if (remaining <= 0 || remaining > wait) {
if (timeout) {
clearTimeout(timeout);
timeout = null;
}
previous = now;
result = func.apply(context, args);
if (!timeout)
context = args = null;
}
else if (!timeout && options.trailing !== false) {
timeout = setTimeout(later, remaining);
}
return result;
};
throttled.cancel = function () {
clearTimeout(timeout);
previous = 0;
timeout = context = args = null;
};
return throttled;
});
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