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Zmetser/arrayAccessWithFlow.js

Created October 25, 2019 09:33
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arrayAccessWithFlow.js
/* @flow */
type Slide = {| id: number |}
class Test {
slidesWithAds: Array<Slide> = [{id: 2}, {id: 4}];
getNonAdSlideIndex(indexWithAds: number): ?Slide {
return this.slidesWithAds[indexWithAds];
}
}
const test = new Test();
const slide = test.getNonAdSlideIndex(4);
slide.id // < Cannot get `slide.id` because property `id` is missing in null or undefined [1].
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