39 lines
1.0 KiB
JavaScript
39 lines
1.0 KiB
JavaScript
define(['./restArguments', './delay'], function (restArguments, delay) {
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// When a sequence of calls of the returned function ends, the argument
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// function is triggered. The end of a sequence is defined by the `wait`
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// parameter. If `immediate` is passed, the argument function will be
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// triggered at the beginning of the sequence instead of at the end.
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function debounce(func, wait, immediate) {
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var timeout, result;
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var later = function(context, args) {
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timeout = null;
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if (args) result = func.apply(context, args);
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};
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var debounced = restArguments(function(args) {
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if (timeout) clearTimeout(timeout);
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if (immediate) {
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var callNow = !timeout;
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timeout = setTimeout(later, wait);
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if (callNow) result = func.apply(this, args);
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} else {
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timeout = delay(later, wait, this, args);
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}
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return result;
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});
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debounced.cancel = function() {
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clearTimeout(timeout);
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timeout = null;
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};
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return debounced;
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}
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return debounce;
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});
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