35 lines
605 B
JavaScript
35 lines
605 B
JavaScript
module.exports = debounce
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function debounce (fn, delay, at_start, guarantee) {
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var timeout
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var args
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var self
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return function debounced () {
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self = this
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args = Array.prototype.slice.call(arguments)
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if (timeout && (at_start || guarantee)) {
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return
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} else if (!at_start) {
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clear()
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timeout = setTimeout(run, delay)
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return timeout
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}
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timeout = setTimeout(clear, delay)
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fn.apply(self, args)
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function run () {
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clear()
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fn.apply(self, args)
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}
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function clear () {
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clearTimeout(timeout)
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timeout = null
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}
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}
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}
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