Add loading, empty, and error states when loading data in js via api

描述

贡献者指南

技术栈

javascript

领域

frontend

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。

stale

清晰度议题是否清楚说明期望改动、验收标准和下一步。

clear

前置要求

Basic JavaScriptReact

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

This issue requests adding loading, empty, and error states for data fetched via API. The repository is a UI for Consul and Nomad built with JavaScript (likely React). Since no implementation details are provided, start by examining existing API calls (e.g., in action creators or service layers) to understand the data flow. Add conditional rendering in components to show spinner, empty message, or error message based on state. Refer to similar state management patterns in the codebase.