mirror of
https://github.com/neocities/neocities.git
synced 2025-05-09 00:08:30 +02:00
30 lines
985 B
JavaScript
30 lines
985 B
JavaScript
/*---------------------------------------------------------------------------------------------
|
|
* Copyright (c) Microsoft Corporation. All rights reserved.
|
|
* Licensed under the MIT License. See License.txt in the project root for license information.
|
|
*--------------------------------------------------------------------------------------------*/
|
|
/**
|
|
* Given a function, returns a function that is only calling that function once.
|
|
*/
|
|
export function createSingleCallFunction(fn, fnDidRunCallback) {
|
|
const _this = this;
|
|
let didCall = false;
|
|
let result;
|
|
return function () {
|
|
if (didCall) {
|
|
return result;
|
|
}
|
|
didCall = true;
|
|
if (fnDidRunCallback) {
|
|
try {
|
|
result = fn.apply(_this, arguments);
|
|
}
|
|
finally {
|
|
fnDidRunCallback();
|
|
}
|
|
}
|
|
else {
|
|
result = fn.apply(_this, arguments);
|
|
}
|
|
return result;
|
|
};
|
|
}
|