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