typescript 如何定义一个字段可能是多种类型的一种？-灵析社区

试一下这样 interface IText{} interface IImage{} interface IFile{} type AllTypes = IText | IImage| IFile interface Message{ id:string; payload:AllTypes } 是不是你安装的TS有问题，或者是别的什么问题，我在官方在线编辑器里面也没报错 [传送门](https://link.segmentfault.com/?enc=57ZD0TJSJsQzZN72A8%2F6kg%3D%3D.C2oZTq0gij2eUHMBvIcfW3sPZlcaJbaWdo388xdNTEILzEJwbulRxgHfKeURLDooueKipdVZv3hit5nw7UEB7JbnvlFq9MAXI3mAlXcodusWKWnTHdjiRIqla3SHWa40Ftf9B4ZbDxB30J0Taqd5kDfJ9qiJoXNP97epjKEVLGt3jgaNgl5URJ83p1CMEXLB%2FNcsUI%2FR6lG96znh0kyHbVyPrcv9dkRL7%2FrIAaJejnCDHlJpbtUc9CxdmjdYa0XfzcMssW8%2BvWfN0YJL3MxJAGIxCKsJ0LSGZnR8sDWBmWSdqD7uBubWTri%2FqwLpagG7eTbc9su7qBFY6nXfEvb59TT7VuakFQ94kYDVnXv5ytgV0WxPM1eiJpzOUQ7SbEuvUgKSelFS6%2Bb6DcBJkC8UH8R1Mvp%2FT2VQBH7Kli1eFHjgyF0g%2F7BGnoVt0aLlqbU%2Bl5Y%2FZN3wQj5JwiV8P%2FXjd4wT0CGr5O1ihhzDoRvnH81tN9wFsZaHeUheLO%2BPf85Se%2BxcwMMMckA8tjgiPjcqpY%2FAUcEBPXQlajU64KKfZcPB0TDm%2F1ZKVor9vxAMchhfdgJc%2FQaFYMMEMjXEcuVvwN6dpytPVsR8MHurrbX6ePYZcqmpG1rYtWkeucKRMZ587Mx3c2x0dFLOWLsNlPAQUI%2FkSIMAz0Upye9gI%2FKtrTRFOWzdCte1LX77SM2mL2SBDeQd0QKjHM8qtBlpW1TeeFTRV7kPijM3oJfu9rM8bQfCAG53utosZyogT7szs63jgBfIVkfejCGF%2BKtQS06RCjonx%2FMW3RClwIFIRGi5wMX42ntjYLRRc6FJn7NeC0Zf6az%2Fho8s%2BkKruTrJq8NiYaoQUucQ00gnahAGc9SehxGifrgGrXqU%2BVTlELEQc7C%2Fn%2Bhomg9vQ2pEGtEczoSl8EIbHPBajom%2BWuwElLAlEEqdFe0GU7gTmNg09WypPPPJKnbHkaS1uuO0Dz5TJkCU5pJYrsFKjHIb5gXAxXO8QOo6Cuw27jBByWaaRbayAwxp6a1Huyvm4tkaCjP%2FEdaT3dc5g6Qpzj34cSIRSCHlsdlXQQfC57kdXq1pDrxEZAHJXh%2BdMf8xmOEAxkF8bO6X4rU3RBYnLswnJsIMaOndsb3kk7SSjE0qXU0MrA8dKKcsexUNuboFIw1nS4LxyaA5jDRAqLhcBymeZVZ1HDX3lodM0pUqtUt1wQ5247Dk7zqMvIm%2BTYDpmX0J7Q5DKNQo0A%3D%3D)