debounce
Returns
Creates a debounced function that delays invoking func until after wait
milliseconds have elapsed since the last time the debounced function was
invoked. The debounced function comes with a cancel method to cancel
delayed func invocations and a flush method to immediately invoke them.
Provide options to indicate whether func should be invoked on the
leading and/or trailing edge of the wait timeout. The func is invoked
with the last arguments provided to the debounced function. Subsequent
calls to the debounced function return the result of the last func
invocation.
Note: If leading and trailing options are true, func is
invoked on the trailing edge of the timeout only if the debounced function
is invoked more than once during the wait timeout.
If wait is 0 and leading is false, func invocation is deferred
until to the next tick, similar to setTimeout with a timeout of 0.
See David Corbacho's article
for details over the differences between _.debounce and _.throttle.
Example of Lodash _.debounce
// Avoid costly calculations while the window size is in flux.
jQuery(window).on('resize', _.debounce(calculateLayout, 150));
// Invoke `sendMail` when clicked, debouncing subsequent calls.
jQuery(element).on('click', _.debounce(sendMail, 300, {
'leading': true,
'trailing': false
}));
// Ensure `batchLog` is invoked once after 1 second of debounced calls.
var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
var source = new EventSource('/stream');
jQuery(source).on('message', debounced);
// Cancel the trailing debounced invocation.
jQuery(window).on('popstate', debounced.cancel);