35 lines
1012 B
JavaScript
35 lines
1012 B
JavaScript
// Returns a function, that, as long as it continues to be invoked, will not
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// be triggered. The function will be called after it stops being called for
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// N milliseconds. If `immediate` is passed, trigger the function on the
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// leading edge, instead of the trailing.
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// The callback function returned is assigned a clearDebounceTimeout function
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// that provides for clearing the timeout/debounced function so that it is not called.
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function debounce(func, wait, immediate) {
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var timeout;
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const callback = function () {
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var context = this,
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args = arguments;
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var later = function () {
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timeout = null;
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if (!immediate) {
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func.apply(context, args);
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}
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};
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var callNow = immediate && !timeout;
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clearTimeout(timeout);
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timeout = setTimeout(later, wait);
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if (callNow) {
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func.apply(context, args);
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}
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};
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callback.clearDebounceTimeout = () => {
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clearTimeout(timeout);
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timeout = null;
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};
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return callback;
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}
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export default debounce;
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