sindresorhus/type-fest

Proposal: `ValueOfDeep<Type, 'key.deepKey'>`

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#822 创建于 2024年3月1日

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 (2 评论) (5 反应) (0 负责人)TypeScript (12,328 star) (471 fork)batch import
component:pathshelp wantedtype addition

描述

Short summary

Given: Type: Any type

Provide: Create a type based on the ValueOf of a deeply nested property.

Potential definition

type ValueOfDeep<Type, PathUnion extends Paths<T>>

Use case

Selecting deeply nested objects to be the value of a new type. This may be relevant for auto-generated types where the deep objects aren't unique types but are used independently on the application.

贡献者指南

技术栈
typescript
领域
developer experiencetooling
议题类型
feature
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-3 hours
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
fresh
清晰度议题是否清楚说明期望改动、验收标准和下一步。
mostly clear
前置要求
TypeScriptunderstanding of conditional types
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
60
研究方向
Review existing utility types in type fest such as ValueOf and Paths to understand the pattern. The proposal suggests creating a type that extracts deeply nested property values given a dot separated path. Check discussions in issue comments for any design decisions. Implement ValueOfDeep<Type, Path> using recursive conditional types similar to existing deep types in the library.