React+TS前台项目实战（二）-- 路由配置 + 组件懒加载 + Error Boundary使用

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前言

本文将详细介绍项目中的页面路由配置和异步组件懒加载处理，以提高用户体验，实现过渡效果。

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一、路由配置和懒加载lazy的使用

（1）在React中，通常使用Suspense和lazy函数来实现懒加载，比如使用一个加载动画。
（2）通过这种方式，可以减少初始加载时间，提高应用程序的性能和响应速度。

// @/router/index.ts
import { lazy } from "react";
import { Navigate, RouteObject } from "react-router-dom";
const Layout = lazy(() => import("@/layout"));
const NotFound = lazy(() => import("@/pages/NotFound/index"));
const Home = lazy(() => import("@/pages/Home"));
const NervosDao = lazy(() => import("@/pages/NervosDao"));
const Tokens = lazy(() => import("@/pages/Tokens"));
const Xudts = lazy(() => import("@/pages/Xudts"));
const Charts = lazy(() => import("@/pages/Charts"));
const FeeRateTracker = lazy(() => import("@/pages/FeeRateTracker"));
const routes: RouteObject[] = [{path: "/",element: <Navigate to={`/zh/home`} />,},{path: "/:locale",element: <Navigate to={`/zh/home`} />,},{path: "/:locale",element: <Layout />,children: [// 其他子路由配置{path: "/:locale/home",element: <Home />,},{path: "/:locale/nervosdao",element: <NervosDao />,},{path: "/:locale/tokens",element: <Tokens />,},{path: "/:locale/xudts",element: <Xudts />,},{path: "/:locale/charts",element: <Charts />,},{path: "/:locale/fee-rate-tracker",element: <FeeRateTracker />,},],},{path: "/404",element: <NotFound />,},{path: "*",element: <Navigate to={`/404`} />,},
];
export default routes;

二、TS版本Error Boundary组件封装

// @/components/ErrorBoundary/index.jsx
import * as React from "react";
interface PropsType {children: React.ReactNode;
}
interface StateType {hasError: boolean;Error?: null | Error;ErrorInfo?: null | React.ErrorInfo;
}
export class ErrorBoundary extends React.Component<PropsType, StateType> {constructor(props: PropsType) {super(props);this.state = {hasError: false,Error: null,ErrorInfo: null,};}//控制渲染降级UIstatic getDerivedStateFromError(error: Error): StateType {return { hasError: true };}//捕获抛出异常componentDidCatch(error: Error, errorInfo: React.ErrorInfo) {//传递异常信息this.setState((preState) => ({ hasError: preState.hasError, Error: error, ErrorInfo: errorInfo }));//可以将异常信息抛出给日志系统等等//do something....}render() {const { hasError, Error, ErrorInfo } = this.state;const { children } = this.props;//如果捕获到异常，渲染降级UIif (hasError) {return (<div><h1>{`Error:${Error?.message}`}</h1><details style={{ whiteSpace: "pre-wrap" }}>{ErrorInfo?.componentStack}</details></div>);}return children;}
}

三、在layout组件中使用Suspense组件和错误边界组件

// @/layout/index.tsx
import { Suspense } from "react";
import { ErrorBoundary } from "@/components/ErrorBoundary";
const LayOut = () => {// ....return (// ...<Suspense fallback={<span>loading...</span>}><ErrorBoundary><Outlet /></ErrorBoundary></Suspense>// ...);
};
export default LayOut;

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总结

下一篇讲【国际化配置】。关注本栏目，将实时更新。