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// Credit David Walsh (https://davidwalsh.name/javascript-debounce-function) | ||
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// Returns a function, that, as long as it continues to be invoked, will not | ||
// be triggered. The function will be called after it stops being called for | ||
// N milliseconds. If `immediate` is passed, trigger the function on the | ||
// leading edge, instead of the trailing. | ||
export default function debounce(func, wait, immediate) { | ||
let timeout | ||
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return function executedFunction() { | ||
const context = this | ||
const args = arguments | ||
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const later = function() { | ||
timeout = null | ||
if (!immediate) func.apply(context, args) | ||
} | ||
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const callNow = immediate && !timeout | ||
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clearTimeout(timeout) | ||
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timeout = setTimeout(later, wait) | ||
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if (callNow) func.apply(context, args) | ||
} | ||
} |