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arturovt
e2eaac34b0
We must read `Symbol.species` safely because `this` may be anything. For instance, `this` may be an object without a prototype (created through `Object.create(null)`); thus `this.constructor` will be undefined. One of the use cases is SystemJS creating prototype-less objects (modules) via `Object.create(null)`. The SystemJS creates an empty object and copies promise properties into that object (within the `getOrCreateLoad` function). The zone.js then checks if the resolved value has the `then` method and invokes it with the `value` context. Otherwise, this will throw an error: `TypeError: Cannot read properties of undefined (reading 'Symbol(Symbol.species)')`. PR Close #45369
Angular
The sources for this package are in the main Angular repo. Please file issues and pull requests against that repo.
Usage information and reference details can be found in Angular documentation.
License: MIT