Failed to access the interface behind it when intersecting an interface with the same key.

[etch-cure]

🔎 Search Terms

interface intersection type

🕗 Version & Regression Information

• This is a crash
• This changed between versions ______ and _______
• This changed in commit or PR _______
• This is the behavior in every version I tried, and I reviewed the FAQ for entries about _________
• I was unable to test this on prior versions because _______

⏯ Playground Link

https://www.typescriptlang.org/play?#code/JYOwLgpgTgZghgYwgAgEIFcxgPYgApxRwC2yA3gFDLLYBGAVgNIQCeAXMgM5hSgDmAbipcwLADYQO3XiEHCIANwjgpPfkIC+FCqEixEKAMoQwxiQjDBcBIqUrVOEc5dycOGLNcIkA2gF1NbV1oeCRkABUIAA9TEzMICysQcmFHZyS3cmQxOFonVRk+ZA1-QIpogAdsKDBkYP0wgDF0MTFjWPTcFOoK72IOdvjEr1tkADII6NiOhJcQCi0KBFda6JIKiWbWwadZpI4ttrjd4eSAXm7kXtsOe2ouE7nMn2F7y7fqOiZWDgByX4ANK8PtxxJJkL8ACYQeAtMAABkBwLeimUYD+SI+9xyeTEfwA8hU5sgAIy-ZHFIFYu5Yr7MdgQzFYkRgv7Q2FiBFMrGolSMqnMnH5CGE4lkilaLEAeilyEAN6OABjrAAujyEAKs3IQBznYABceQgAJBwC7C8hALargEqu5CAFNnAAA1yEtgFKm4F+YRaDRCcpRdabFpHGanAB01xIvrSe1cvpg1QAoogABYACgUcDE6BQZwAfMgE0mIL6hWIAJRAA

💻 Code

interface ButtonParam {
  objKey: string;
  style: string;
  event: string;
}

interface SetSelectionParam {
  selections: ButtonParam[];
}

interface TextSetSelection {
  selections: { label: string }[];
}

export interface FullSetSelection {
  param: SetSelectionParam & TextSetSelection
}

const exampleFullSetSelection: FullSetSelection = {
  param: {
    selections: [
      {
        objKey: '',
        style: 'default0',
        event: '',
        label: 'Option 1'
      },
      {
        objKey: '',
        style: 'default0',
        event: '',
        label: 'Option 1'
      }
    ]
  }
};

exampleFullSetSelection.param.selections.forEach(value => value.label)

🙁 Actual behavior

exampleFullSetSelection.param.selections.forEach(value => value.label)

in here, it can not access value.label.

🙂 Expected behavior

exampleFullSetSelection.param.selections.forEach(value => value.label)

in here, it can access value.label.

Additional information about the issue

No response

[jcalz]

Duplicate of #41874

[typescript-bot]

This issue has been marked as "Duplicate" and has seen no recent activity. It has been automatically closed for house-keeping purposes.