prepack/lib/intrinsics/ecma262/PromisePrototype.js

Execute a JS bundle, serialize global state and side effects to a snapshot that can be quickly restored.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

exports.default = function (realm, obj) {
  // ECMA262 25.4.5.1
  obj.defineNativeMethod("catch", 1, (context, [onRejected]) => {
    // 1. Let promise be the this value.
    let promise = context;

    // 2. Return ? Invoke(promise, "then", « undefined, onRejected »).
    return (0, _index2.Invoke)(realm, promise, "then", [realm.intrinsics.undefined, onRejected]);
  });

  // ECMA262 25.4.5.3
  obj.defineNativeMethod("then", 2, (context, [onFulfilled, onRejected]) => {
    // 1. Let promise be the this value.
    let promise = context;

    // 2. If IsPromise(promise) is false, throw a TypeError exception.
    if (!(0, _index2.IsPromise)(realm, promise)) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    }
    (0, _invariant2.default)(promise instanceof _index.ObjectValue);

    // 3. Let C be ? SpeciesConstructor(promise, %Promise%).
    let C = (0, _index2.SpeciesConstructor)(realm, promise, realm.intrinsics.Promise);

    // 4. Let resultCapability be ? NewPromiseCapability(C).
    let resultCapability = (0, _promise.NewPromiseCapability)(realm, C);

    // 5. Return PerformPromiseThen(promise, onFulfilled, onRejected, resultCapability).
    return (0, _promise.PerformPromiseThen)(realm, promise, onFulfilled, onRejected, resultCapability);
  });

  // ECMA262 25.4.5.4 Promise.prototype [ @@toStringTag ]
  obj.defineNativeProperty(realm.intrinsics.SymbolToStringTag, new _index.StringValue(realm, "Promise"), { writable: false });
};

var _index = require("../../values/index.js");

var _index2 = require("../../methods/index.js");

var _promise = require("../../methods/promise.js");

var _invariant = require("../../invariant.js");

var _invariant2 = _interopRequireDefault(_invariant);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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