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Index signature incorrectly treats object properties #13421

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hinell opened this issue Jan 11, 2017 · 2 comments
Closed

Index signature incorrectly treats object properties #13421

hinell opened this issue Jan 11, 2017 · 2 comments
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@hinell
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hinell commented Jan 11, 2017 •
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TypeScript Version: 2.1.4 - Windows version tsc.cmd
Description: Index signature bug.

var foo: { bar?: 0; [key: string]: any } = {};
foo.newProp   = '';  // Error: Property 'newProp' does not exist on type of foo
foo['newProp']= ''   // NO error!!! Same code!

How is it possible? 😕

Expected behavior: NO error.
Actual behavior: Error exists.
@normalser
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FYI #12596

@hinell
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hinell commented Jan 12, 2017

@wallverb Ah, thanks.

@hinell hinell closed this as completed Jan 12, 2017
@RyanCavanaugh RyanCavanaugh added the Duplicate An existing issue was already created label Jan 12, 2017
@microsoft microsoft locked and limited conversation to collaborators Jun 19, 2018
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@normalser @RyanCavanaugh @hinell