microsoft / microsoft/TypeScript
Custom JSDoc type cannot be extended
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@sandersn is already working on this.
Since Jul 9, 2025.
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Description
Does this issue occur when all extensions are disabled?: Yes/No
- VS Code Version: 1.99.3
- OS Version: Linux x64 6.11.0-24-generic
Steps to Reproduce:
- Define a base JSDoc type:
/**
* @typedef {object} baseType
* @property {string} baseProperty
*/
- Define a child type and add a property:
/**
* @typedef {baseType} childType
* @property {string} childProperty
*/
Expected behavior: childType has baseProperty from baseType and childProperty from the own definition.
Actual behavior: childType has only baseProperty from baseType.
However, it works in WebStorm:
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