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Add pending() function to debounce and throttle to fix #3387 (#3388)

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This commit is contained in:
Christopher James Calo
2017-09-27 10:43:46 -04:00
committed by John-David Dalton
parent f5ea579db3
commit 6ad829fa90
1 changed files with 8 additions and 0 deletions
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8
debounce.js
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@@ -51,6 +51,9 @@ import isObject from './isObject.js'
* *
* // Cancel the trailing debounced invocation. * // Cancel the trailing debounced invocation.
* jQuery(window).on('popstate', debounced.cancel) * jQuery(window).on('popstate', debounced.cancel)
*
* // Check for pending invocations.
* const status = debounced.pending() ? "Pending…" : "Ready"
*/ */
function debounce(func, wait, options) { function debounce(func, wait, options) {
let lastArgs, let lastArgs,
@@ -148,6 +151,10 @@ function debounce(func, wait, options) {
function flush() { function flush() {
return timerId === undefined ? result : trailingEdge(Date.now()) return timerId === undefined ? result : trailingEdge(Date.now())
} }
function pending() {
return timerId !== undefined
}
function debounced(...args) { function debounced(...args) {
const time = Date.now() const time = Date.now()
@@ -174,6 +181,7 @@ function debounce(func, wait, options) {
} }
debounced.cancel = cancel debounced.cancel = cancel
debounced.flush = flush debounced.flush = flush
debounced.pending = pending
return debounced return debounced
} }