sindresorhus/type-fest

Jsonify makes Record<string, any> disappear

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#667 建立於 2023年8月24日

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 (7 留言) (0 反應) (0 負責人)TypeScript (12,328 star) (471 fork)batch import
enhancementhelp wanted

描述

Here's a TS Playground:

import type { Jsonify } from "type-fest";

type Data = Jsonify<{
  payload: Record<string, any>;
}>;

declare const d: Data;
console.log(d.payload) // <-- Property 'payload' does not exist on type 'JsonifyObject<{}>'.

This feels like a bug to me. It's causing an issue for me in the upcoming version of Remix: https://github.com/remix-run/remix/issues/7246

My current workaround is to change the type to unknown instead of any (https://github.com/edmundhung/conform/pull/272 which will hopefully be merged soon). I think is the proper thing to do, but sometimes that's hard because you may not control the type. I think it's more correct to keep the record around on the type.

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技術棧
typescript
領域
developer experience
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-3 hours
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
Basic TypeScriptUnderstanding of type fest
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
30
研究方向
Investigate the Jsonify type implementation in the source (likely source/jsonify.ts). The issue demonstrates that Jsonify<Record<string, any>> resolves to an empty object. The root cause is likely in the handling of index signatures in mapped types. Consider how the type can preserve the Record shape. Also review the linked Remix issue for context. Add a test to cover this case.
Jsonify makes Record<string, any> disappear · sindresorhus/type-fest#667 | Good First Issue