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34 lines
619 B
34 lines
619 B
import {
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invokeCallback,
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subscribe,
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FULFILLED,
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REJECTED,
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noop,
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makePromise,
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PROMISE_ID
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} from './-internal';
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import { asap } from './asap';
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export default function then(onFulfillment, onRejection) {
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var parent = this;
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var child = new this.constructor(noop);
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if (child[PROMISE_ID] === undefined) {
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makePromise(child);
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}
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var state = parent._state;
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if (state) {
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var callback = arguments[state - 1];
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asap(function(){
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invokeCallback(state, child, callback, parent._result);
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});
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} else {
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subscribe(parent, child, onFulfillment, onRejection);
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}
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return child;
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}
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