使用可加载代码和可加载代码进行代码拆分会导致屏幕闪烁

时间:2019-02-10 04:52:11

标签: reactjs code-splitting react-loadable

我正在尝试将代码拆分应用于我的React应用。以下代码是我的路线,其中Loadablereact-loadable应用了代码拆分。通过该实现,每次我访问每个页面时,都会正确加载来自webpack的代码块。但是,当我最初访问网页时,最初会导致屏幕闪烁。之后,如果我移至另一页,则不再有屏幕闪烁。仅在最初访问我的网站时发生。

有人知道为什么会这样吗?我的配置有问题吗?

顺便说一句,我在React应用程序中使用了Node.js进行服务器端渲染。是否与代码拆分引起的屏幕闪烁有关?

routes.jsx

import React from "react";
import Loadable from "react-loadable";
import { Route, Switch } from "react-router-dom";

import NotFound from "routes/not-found";

const Landing = Loadable({
  loader: () => import(/* webpackChunkName: "landing" */ "routes/landing"),
  loading: () => null,
  modules: ["landing"]
});

const About = Loadable({
  loader: () => import(/* webpackChunkName: "about" */ "routes/about"),
  loading: () => null,
  modules: ["about"]
});

export default props => {
  return (
    <Switch>
      <Route
        exact
        path="/"
        render={routeProps => <Landing {...routeProps} options={options} />}
      />
      {/* <Route exact path="/" component={Homepage} /> */}
      <Route
        exact
        path="/about"
        render={routeProps => <About {...routeProps} options={options} />}
      />

      <Route component={NotFound} />
    </Switch>
  );
};

src / index.js

const { store, history } = createStore();
const generateClassName = createGenerateClassName();

const Application = (
  <JssProvider generateClassName={generateClassName}>
    <MuiThemeProvider theme={theme}>
      <Provider store={store}>
        <ConnectedRouter history={history}>
          <Frontload noServerRender={true}>
            <App />
          </Frontload>
        </ConnectedRouter>
      </Provider>
    </MuiThemeProvider>
  </JssProvider>
);

const root = document.querySelector("#root");

if (root.hasChildNodes() === true) {
  // If it's an SSR, we use hydrate to get fast page loads by just
  // attaching event listeners after the initial render
  Loadable.preloadReady().then(() => {
    hydrate(Application, root, () => {
      document.getElementById("jss-styles").remove();
    });
  });
} else {
  // If we're not running on the server, just render like normal
  render(Application, root);
}

1 个答案:

答案 0 :(得分:0)

之所以会发生闪烁,是因为路由器在路由时没有组件的来源,并且会根据提供给Loadable HOC的null函数中的定义呈现loading 为防止闪烁,您可以呈现一个看起来像这样的Loading组件:https://github.com/osamu38/react-loadable-router-example/blob/master/src/components/Loading.js

或者您可以像这样预加载ComponentDidMount上的所有页面(您应该将其转换为类组件):

 componentDidMount = () => {
    About.preload()
    Landing.preload()
  }