forked from zhurui/management
22 lines
1.3 KiB
JavaScript
22 lines
1.3 KiB
JavaScript
|
/* eslint-disable no-undefined */
|
||
|
|
|
||
|
|
var throttle = require('./throttle');
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Debounce execution of a function. Debouncing, unlike throttling,
|
||
|
|
* guarantees that a function is only executed a single time, either at the
|
||
|
|
* very beginning of a series of calls, or at the very end.
|
||
|
|
*
|
||
|
|
* @param {Number} delay A zero-or-greater delay in milliseconds. For event callbacks, values around 100 or 250 (or even higher) are most useful.
|
||
|
|
* @param {Boolean} [atBegin] Optional, defaults to false. If atBegin is false or unspecified, callback will only be executed `delay` milliseconds
|
||
|
|
* after the last debounced-function call. If atBegin is true, callback will be executed only at the first debounced-function call.
|
||
|
|
* (After the throttled-function has not been called for `delay` milliseconds, the internal counter is reset).
|
||
|
|
* @param {Function} callback A function to be executed after delay milliseconds. The `this` context and all arguments are passed through, as-is,
|
||
|
|
* to `callback` when the debounced-function is executed.
|
||
|
|
*
|
||
|
|
* @return {Function} A new, debounced function.
|
||
|
|
*/
|
||
|
|
module.exports = function ( delay, atBegin, callback ) {
|
||
|
|
return callback === undefined ? throttle(delay, atBegin, false) : throttle(delay, callback, atBegin !== false);
|
||
|
|
};
|