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Type guard intersection types - #9031
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| // All winged beasts with legs | ||
| if (hasWings(beast)) { | ||
| if (beast.legs === 4) { // ERROR TS2339: Property 'legs' does not exist on type 'Winged'. |
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| } | ||
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| // Repro from #9011 |
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This is a really great enhancement to type guards. |
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IMO this is a major improvement to control flow based type inference that should probably be mentioned in the roadmap and in the upcoming 'what's new in TypeScript' for 2.0. |
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Fixes #8911.