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Indexed read from dictionary not considered potentially undefined under strictNullChecks #12287

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Jessidhia opened this issue Nov 16, 2016 · 1 comment
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Indexed read from dictionary not considered potentially undefined under strictNullChecks #12287

Jessidhia opened this issue Nov 16, 2016 · 1 comment
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@Jessidhia
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With typescript@master:

// with "strictNullChecks": true
interface A {
  [key: string]: string
}
const x: A = {}
const b = x['undefined']
// b is string instead of string | undefined
@normalser
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#9235

@mhegazy mhegazy added the Duplicate An existing issue was already created label Nov 16, 2016
@OliverJAsh OliverJAsh mentioned this issue Jan 31, 2017
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@MartinJohns MartinJohns mentioned this issue May 2, 2018
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@Jessidhia @normalser @RyanCavanaugh @mhegazy