[6a3a178] | 1 | 'use strict';
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| 2 | var $ = require('../internals/export');
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| 3 | var IS_PURE = require('../internals/is-pure');
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| 4 | var global = require('../internals/global');
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| 5 | var getBuiltIn = require('../internals/get-built-in');
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| 6 | var NativePromise = require('../internals/native-promise-constructor');
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| 7 | var redefine = require('../internals/redefine');
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| 8 | var redefineAll = require('../internals/redefine-all');
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| 9 | var setPrototypeOf = require('../internals/object-set-prototype-of');
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| 10 | var setToStringTag = require('../internals/set-to-string-tag');
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| 11 | var setSpecies = require('../internals/set-species');
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| 12 | var isObject = require('../internals/is-object');
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| 13 | var aFunction = require('../internals/a-function');
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| 14 | var anInstance = require('../internals/an-instance');
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| 15 | var inspectSource = require('../internals/inspect-source');
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| 16 | var iterate = require('../internals/iterate');
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| 17 | var checkCorrectnessOfIteration = require('../internals/check-correctness-of-iteration');
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| 18 | var speciesConstructor = require('../internals/species-constructor');
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| 19 | var task = require('../internals/task').set;
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| 20 | var microtask = require('../internals/microtask');
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| 21 | var promiseResolve = require('../internals/promise-resolve');
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| 22 | var hostReportErrors = require('../internals/host-report-errors');
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| 23 | var newPromiseCapabilityModule = require('../internals/new-promise-capability');
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| 24 | var perform = require('../internals/perform');
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| 25 | var InternalStateModule = require('../internals/internal-state');
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| 26 | var isForced = require('../internals/is-forced');
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| 27 | var wellKnownSymbol = require('../internals/well-known-symbol');
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| 28 | var IS_BROWSER = require('../internals/engine-is-browser');
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| 29 | var IS_NODE = require('../internals/engine-is-node');
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| 30 | var V8_VERSION = require('../internals/engine-v8-version');
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| 31 |
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| 32 | var SPECIES = wellKnownSymbol('species');
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| 33 | var PROMISE = 'Promise';
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| 34 | var getInternalState = InternalStateModule.get;
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| 35 | var setInternalState = InternalStateModule.set;
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| 36 | var getInternalPromiseState = InternalStateModule.getterFor(PROMISE);
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| 37 | var NativePromisePrototype = NativePromise && NativePromise.prototype;
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| 38 | var PromiseConstructor = NativePromise;
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| 39 | var PromiseConstructorPrototype = NativePromisePrototype;
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| 40 | var TypeError = global.TypeError;
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| 41 | var document = global.document;
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| 42 | var process = global.process;
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| 43 | var newPromiseCapability = newPromiseCapabilityModule.f;
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| 44 | var newGenericPromiseCapability = newPromiseCapability;
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| 45 | var DISPATCH_EVENT = !!(document && document.createEvent && global.dispatchEvent);
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| 46 | var NATIVE_REJECTION_EVENT = typeof PromiseRejectionEvent == 'function';
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| 47 | var UNHANDLED_REJECTION = 'unhandledrejection';
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| 48 | var REJECTION_HANDLED = 'rejectionhandled';
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| 49 | var PENDING = 0;
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| 50 | var FULFILLED = 1;
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| 51 | var REJECTED = 2;
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| 52 | var HANDLED = 1;
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| 53 | var UNHANDLED = 2;
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| 54 | var SUBCLASSING = false;
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| 55 | var Internal, OwnPromiseCapability, PromiseWrapper, nativeThen;
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| 56 |
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| 57 | var FORCED = isForced(PROMISE, function () {
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| 58 | var PROMISE_CONSTRUCTOR_SOURCE = inspectSource(PromiseConstructor);
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| 59 | var GLOBAL_CORE_JS_PROMISE = PROMISE_CONSTRUCTOR_SOURCE !== String(PromiseConstructor);
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| 60 | // V8 6.6 (Node 10 and Chrome 66) have a bug with resolving custom thenables
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| 61 | // https://bugs.chromium.org/p/chromium/issues/detail?id=830565
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| 62 | // We can't detect it synchronously, so just check versions
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| 63 | if (!GLOBAL_CORE_JS_PROMISE && V8_VERSION === 66) return true;
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| 64 | // We need Promise#finally in the pure version for preventing prototype pollution
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| 65 | if (IS_PURE && !PromiseConstructorPrototype['finally']) return true;
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| 66 | // We can't use @@species feature detection in V8 since it causes
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| 67 | // deoptimization and performance degradation
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| 68 | // https://github.com/zloirock/core-js/issues/679
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| 69 | if (V8_VERSION >= 51 && /native code/.test(PROMISE_CONSTRUCTOR_SOURCE)) return false;
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| 70 | // Detect correctness of subclassing with @@species support
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| 71 | var promise = new PromiseConstructor(function (resolve) { resolve(1); });
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| 72 | var FakePromise = function (exec) {
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| 73 | exec(function () { /* empty */ }, function () { /* empty */ });
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| 74 | };
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| 75 | var constructor = promise.constructor = {};
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| 76 | constructor[SPECIES] = FakePromise;
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| 77 | SUBCLASSING = promise.then(function () { /* empty */ }) instanceof FakePromise;
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| 78 | if (!SUBCLASSING) return true;
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| 79 | // Unhandled rejections tracking support, NodeJS Promise without it fails @@species test
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| 80 | return !GLOBAL_CORE_JS_PROMISE && IS_BROWSER && !NATIVE_REJECTION_EVENT;
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| 81 | });
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| 82 |
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| 83 | var INCORRECT_ITERATION = FORCED || !checkCorrectnessOfIteration(function (iterable) {
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| 84 | PromiseConstructor.all(iterable)['catch'](function () { /* empty */ });
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| 85 | });
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| 86 |
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| 87 | // helpers
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| 88 | var isThenable = function (it) {
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| 89 | var then;
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| 90 | return isObject(it) && typeof (then = it.then) == 'function' ? then : false;
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| 91 | };
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| 92 |
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| 93 | var notify = function (state, isReject) {
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| 94 | if (state.notified) return;
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| 95 | state.notified = true;
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| 96 | var chain = state.reactions;
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| 97 | microtask(function () {
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| 98 | var value = state.value;
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| 99 | var ok = state.state == FULFILLED;
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| 100 | var index = 0;
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| 101 | // variable length - can't use forEach
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| 102 | while (chain.length > index) {
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| 103 | var reaction = chain[index++];
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| 104 | var handler = ok ? reaction.ok : reaction.fail;
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| 105 | var resolve = reaction.resolve;
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| 106 | var reject = reaction.reject;
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| 107 | var domain = reaction.domain;
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| 108 | var result, then, exited;
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| 109 | try {
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| 110 | if (handler) {
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| 111 | if (!ok) {
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| 112 | if (state.rejection === UNHANDLED) onHandleUnhandled(state);
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| 113 | state.rejection = HANDLED;
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| 114 | }
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| 115 | if (handler === true) result = value;
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| 116 | else {
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| 117 | if (domain) domain.enter();
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| 118 | result = handler(value); // can throw
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| 119 | if (domain) {
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| 120 | domain.exit();
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| 121 | exited = true;
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| 122 | }
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| 123 | }
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| 124 | if (result === reaction.promise) {
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| 125 | reject(TypeError('Promise-chain cycle'));
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| 126 | } else if (then = isThenable(result)) {
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| 127 | then.call(result, resolve, reject);
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| 128 | } else resolve(result);
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| 129 | } else reject(value);
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| 130 | } catch (error) {
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| 131 | if (domain && !exited) domain.exit();
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| 132 | reject(error);
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| 133 | }
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| 134 | }
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| 135 | state.reactions = [];
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| 136 | state.notified = false;
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| 137 | if (isReject && !state.rejection) onUnhandled(state);
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| 138 | });
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| 139 | };
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| 140 |
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| 141 | var dispatchEvent = function (name, promise, reason) {
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| 142 | var event, handler;
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| 143 | if (DISPATCH_EVENT) {
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| 144 | event = document.createEvent('Event');
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| 145 | event.promise = promise;
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| 146 | event.reason = reason;
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| 147 | event.initEvent(name, false, true);
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| 148 | global.dispatchEvent(event);
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| 149 | } else event = { promise: promise, reason: reason };
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| 150 | if (!NATIVE_REJECTION_EVENT && (handler = global['on' + name])) handler(event);
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| 151 | else if (name === UNHANDLED_REJECTION) hostReportErrors('Unhandled promise rejection', reason);
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| 152 | };
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| 153 |
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| 154 | var onUnhandled = function (state) {
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| 155 | task.call(global, function () {
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| 156 | var promise = state.facade;
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| 157 | var value = state.value;
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| 158 | var IS_UNHANDLED = isUnhandled(state);
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| 159 | var result;
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| 160 | if (IS_UNHANDLED) {
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| 161 | result = perform(function () {
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| 162 | if (IS_NODE) {
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| 163 | process.emit('unhandledRejection', value, promise);
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| 164 | } else dispatchEvent(UNHANDLED_REJECTION, promise, value);
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| 165 | });
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| 166 | // Browsers should not trigger `rejectionHandled` event if it was handled here, NodeJS - should
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| 167 | state.rejection = IS_NODE || isUnhandled(state) ? UNHANDLED : HANDLED;
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| 168 | if (result.error) throw result.value;
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| 169 | }
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| 170 | });
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| 171 | };
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| 172 |
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| 173 | var isUnhandled = function (state) {
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| 174 | return state.rejection !== HANDLED && !state.parent;
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| 175 | };
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| 176 |
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| 177 | var onHandleUnhandled = function (state) {
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| 178 | task.call(global, function () {
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| 179 | var promise = state.facade;
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| 180 | if (IS_NODE) {
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| 181 | process.emit('rejectionHandled', promise);
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| 182 | } else dispatchEvent(REJECTION_HANDLED, promise, state.value);
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| 183 | });
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| 184 | };
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| 185 |
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| 186 | var bind = function (fn, state, unwrap) {
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| 187 | return function (value) {
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| 188 | fn(state, value, unwrap);
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| 189 | };
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| 190 | };
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| 191 |
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| 192 | var internalReject = function (state, value, unwrap) {
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| 193 | if (state.done) return;
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| 194 | state.done = true;
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| 195 | if (unwrap) state = unwrap;
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| 196 | state.value = value;
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| 197 | state.state = REJECTED;
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| 198 | notify(state, true);
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| 199 | };
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| 200 |
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| 201 | var internalResolve = function (state, value, unwrap) {
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| 202 | if (state.done) return;
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| 203 | state.done = true;
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| 204 | if (unwrap) state = unwrap;
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| 205 | try {
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| 206 | if (state.facade === value) throw TypeError("Promise can't be resolved itself");
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| 207 | var then = isThenable(value);
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| 208 | if (then) {
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| 209 | microtask(function () {
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| 210 | var wrapper = { done: false };
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| 211 | try {
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| 212 | then.call(value,
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| 213 | bind(internalResolve, wrapper, state),
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| 214 | bind(internalReject, wrapper, state)
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| 215 | );
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| 216 | } catch (error) {
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| 217 | internalReject(wrapper, error, state);
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| 218 | }
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| 219 | });
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| 220 | } else {
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| 221 | state.value = value;
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| 222 | state.state = FULFILLED;
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| 223 | notify(state, false);
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| 224 | }
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| 225 | } catch (error) {
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| 226 | internalReject({ done: false }, error, state);
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| 227 | }
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| 228 | };
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| 229 |
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| 230 | // constructor polyfill
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| 231 | if (FORCED) {
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| 232 | // 25.4.3.1 Promise(executor)
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| 233 | PromiseConstructor = function Promise(executor) {
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| 234 | anInstance(this, PromiseConstructor, PROMISE);
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| 235 | aFunction(executor);
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| 236 | Internal.call(this);
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| 237 | var state = getInternalState(this);
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| 238 | try {
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| 239 | executor(bind(internalResolve, state), bind(internalReject, state));
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| 240 | } catch (error) {
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| 241 | internalReject(state, error);
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| 242 | }
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| 243 | };
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| 244 | PromiseConstructorPrototype = PromiseConstructor.prototype;
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| 245 | // eslint-disable-next-line no-unused-vars -- required for `.length`
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| 246 | Internal = function Promise(executor) {
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| 247 | setInternalState(this, {
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| 248 | type: PROMISE,
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| 249 | done: false,
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| 250 | notified: false,
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| 251 | parent: false,
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| 252 | reactions: [],
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| 253 | rejection: false,
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| 254 | state: PENDING,
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| 255 | value: undefined
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| 256 | });
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| 257 | };
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| 258 | Internal.prototype = redefineAll(PromiseConstructorPrototype, {
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| 259 | // `Promise.prototype.then` method
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| 260 | // https://tc39.es/ecma262/#sec-promise.prototype.then
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| 261 | then: function then(onFulfilled, onRejected) {
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| 262 | var state = getInternalPromiseState(this);
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| 263 | var reaction = newPromiseCapability(speciesConstructor(this, PromiseConstructor));
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| 264 | reaction.ok = typeof onFulfilled == 'function' ? onFulfilled : true;
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| 265 | reaction.fail = typeof onRejected == 'function' && onRejected;
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| 266 | reaction.domain = IS_NODE ? process.domain : undefined;
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| 267 | state.parent = true;
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| 268 | state.reactions.push(reaction);
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| 269 | if (state.state != PENDING) notify(state, false);
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| 270 | return reaction.promise;
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| 271 | },
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| 272 | // `Promise.prototype.catch` method
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| 273 | // https://tc39.es/ecma262/#sec-promise.prototype.catch
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| 274 | 'catch': function (onRejected) {
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| 275 | return this.then(undefined, onRejected);
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| 276 | }
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| 277 | });
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| 278 | OwnPromiseCapability = function () {
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| 279 | var promise = new Internal();
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| 280 | var state = getInternalState(promise);
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| 281 | this.promise = promise;
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| 282 | this.resolve = bind(internalResolve, state);
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| 283 | this.reject = bind(internalReject, state);
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| 284 | };
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| 285 | newPromiseCapabilityModule.f = newPromiseCapability = function (C) {
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| 286 | return C === PromiseConstructor || C === PromiseWrapper
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| 287 | ? new OwnPromiseCapability(C)
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| 288 | : newGenericPromiseCapability(C);
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| 289 | };
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| 290 |
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| 291 | if (!IS_PURE && typeof NativePromise == 'function' && NativePromisePrototype !== Object.prototype) {
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| 292 | nativeThen = NativePromisePrototype.then;
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| 293 |
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| 294 | if (!SUBCLASSING) {
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| 295 | // make `Promise#then` return a polyfilled `Promise` for native promise-based APIs
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| 296 | redefine(NativePromisePrototype, 'then', function then(onFulfilled, onRejected) {
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| 297 | var that = this;
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| 298 | return new PromiseConstructor(function (resolve, reject) {
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| 299 | nativeThen.call(that, resolve, reject);
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| 300 | }).then(onFulfilled, onRejected);
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| 301 | // https://github.com/zloirock/core-js/issues/640
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| 302 | }, { unsafe: true });
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| 303 |
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| 304 | // makes sure that native promise-based APIs `Promise#catch` properly works with patched `Promise#then`
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| 305 | redefine(NativePromisePrototype, 'catch', PromiseConstructorPrototype['catch'], { unsafe: true });
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| 306 | }
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| 307 |
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| 308 | // make `.constructor === Promise` work for native promise-based APIs
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| 309 | try {
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| 310 | delete NativePromisePrototype.constructor;
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| 311 | } catch (error) { /* empty */ }
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| 312 |
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| 313 | // make `instanceof Promise` work for native promise-based APIs
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| 314 | if (setPrototypeOf) {
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| 315 | setPrototypeOf(NativePromisePrototype, PromiseConstructorPrototype);
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| 316 | }
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| 317 | }
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| 318 | }
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| 319 |
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| 320 | $({ global: true, wrap: true, forced: FORCED }, {
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| 321 | Promise: PromiseConstructor
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| 322 | });
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| 323 |
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| 324 | setToStringTag(PromiseConstructor, PROMISE, false, true);
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| 325 | setSpecies(PROMISE);
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| 326 |
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| 327 | PromiseWrapper = getBuiltIn(PROMISE);
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| 328 |
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| 329 | // statics
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| 330 | $({ target: PROMISE, stat: true, forced: FORCED }, {
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| 331 | // `Promise.reject` method
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| 332 | // https://tc39.es/ecma262/#sec-promise.reject
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| 333 | reject: function reject(r) {
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| 334 | var capability = newPromiseCapability(this);
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| 335 | capability.reject.call(undefined, r);
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| 336 | return capability.promise;
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| 337 | }
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| 338 | });
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| 339 |
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| 340 | $({ target: PROMISE, stat: true, forced: IS_PURE || FORCED }, {
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| 341 | // `Promise.resolve` method
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| 342 | // https://tc39.es/ecma262/#sec-promise.resolve
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| 343 | resolve: function resolve(x) {
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| 344 | return promiseResolve(IS_PURE && this === PromiseWrapper ? PromiseConstructor : this, x);
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| 345 | }
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| 346 | });
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| 347 |
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| 348 | $({ target: PROMISE, stat: true, forced: INCORRECT_ITERATION }, {
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| 349 | // `Promise.all` method
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| 350 | // https://tc39.es/ecma262/#sec-promise.all
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| 351 | all: function all(iterable) {
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| 352 | var C = this;
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| 353 | var capability = newPromiseCapability(C);
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| 354 | var resolve = capability.resolve;
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| 355 | var reject = capability.reject;
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| 356 | var result = perform(function () {
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| 357 | var $promiseResolve = aFunction(C.resolve);
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| 358 | var values = [];
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| 359 | var counter = 0;
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| 360 | var remaining = 1;
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| 361 | iterate(iterable, function (promise) {
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| 362 | var index = counter++;
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| 363 | var alreadyCalled = false;
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| 364 | values.push(undefined);
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| 365 | remaining++;
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| 366 | $promiseResolve.call(C, promise).then(function (value) {
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| 367 | if (alreadyCalled) return;
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| 368 | alreadyCalled = true;
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| 369 | values[index] = value;
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| 370 | --remaining || resolve(values);
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| 371 | }, reject);
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| 372 | });
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| 373 | --remaining || resolve(values);
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| 374 | });
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| 375 | if (result.error) reject(result.value);
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| 376 | return capability.promise;
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| 377 | },
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| 378 | // `Promise.race` method
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| 379 | // https://tc39.es/ecma262/#sec-promise.race
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| 380 | race: function race(iterable) {
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| 381 | var C = this;
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| 382 | var capability = newPromiseCapability(C);
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| 383 | var reject = capability.reject;
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| 384 | var result = perform(function () {
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| 385 | var $promiseResolve = aFunction(C.resolve);
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| 386 | iterate(iterable, function (promise) {
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| 387 | $promiseResolve.call(C, promise).then(capability.resolve, reject);
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| 388 | });
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| 389 | });
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| 390 | if (result.error) reject(result.value);
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| 391 | return capability.promise;
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| 392 | }
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| 393 | });
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