package.modules.es.promise.try.js Maven / Gradle / Ivy
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'use strict';
var $ = require('../internals/export');
var globalThis = require('../internals/global-this');
var apply = require('../internals/function-apply');
var slice = require('../internals/array-slice');
var newPromiseCapabilityModule = require('../internals/new-promise-capability');
var aCallable = require('../internals/a-callable');
var perform = require('../internals/perform');
var Promise = globalThis.Promise;
var ACCEPT_ARGUMENTS = false;
// Avoiding the use of polyfills of the previous iteration of this proposal
// that does not accept arguments of the callback
var FORCED = !Promise || !Promise['try'] || perform(function () {
Promise['try'](function (argument) {
ACCEPT_ARGUMENTS = argument === 8;
}, 8);
}).error || !ACCEPT_ARGUMENTS;
// `Promise.try` method
// https://tc39.es/ecma262/#sec-promise.try
$({ target: 'Promise', stat: true, forced: FORCED }, {
'try': function (callbackfn /* , ...args */) {
var args = arguments.length > 1 ? slice(arguments, 1) : [];
var promiseCapability = newPromiseCapabilityModule.f(this);
var result = perform(function () {
return apply(aCallable(callbackfn), undefined, args);
});
(result.error ? promiseCapability.reject : promiseCapability.resolve)(result.value);
return promiseCapability.promise;
}
});
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