Created
November 18, 2016 10:39
-
-
Save vinhlh/31b2eef8f8d30b2538356353c3429b73 to your computer and use it in GitHub Desktop.
debounce.js
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
// 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. | |
_.debounce = function(func, wait, immediate) { | |
var timeout, result; | |
var later = function(context, args) { | |
timeout = null; | |
if (args) result = func.apply(context, args); | |
}; | |
var debounced = restArgs(function(args) { | |
if (timeout) clearTimeout(timeout); | |
if (immediate) { | |
var callNow = !timeout; | |
timeout = setTimeout(later, wait); | |
if (callNow) result = func.apply(this, args); | |
} else { | |
timeout = _.delay(later, wait, this, args); | |
} | |
return result; | |
}); | |
debounced.cancel = function() { | |
clearTimeout(timeout); | |
timeout = null; | |
}; | |
return debounced; | |
}; |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment