为什么要做dynamic import? dynamic import不知道为什么有很多叫法,什么按需加载,懒加载,Code Splitting,代码分页等.总之,就是在SPA,把JS代码分成N个页面份数的文件,不在用户刚进来就全部引入,而是等用户跳转路由的时候,再加载对应的JS文件.这样做的好处就是加速首屏显示速度,同时也减少了资源的浪费. 为什么选择 webpack 3? 更高的性能 有scope hosting功能,不再需要rollup来处理代码冗余 可与react-router结合,更优…

cp from : https://www.jianshu.com/p/6a45e2dfc9d9 万恶的根源 距离React Router v4 正式发布也已经过去三个月了,这周把一个React的架子做了升级,之前的路由用的还是v2.7.0版的,所以决定把路由也升级下,正好“尝尝鲜”... 江湖传言,目前官方同时维护 2.x 和 4.x 两个版本.(ヾ(｡ꏿ﹏ꏿ)ﾉﾞ咦,此刻相信机智如我的你也会发现,ReactRouter v3 去哪儿了?整丢了??巴拉出锅了???敢不敢给我个完美的解释!?)事…

React Router v4 allows us to render Routes as components wherever we like in our components. This can provide some interesting use cases for creating dynamic routes on our applications. import React from 'react'; import { BrowserRouter as Router, Rou…

React Router V4 正式版发布,该版本相较于前面三个版本有根本性变化,遵循 Just Component 的 API 设计理念. 本次升级的主要变更有: 声明式 Declarative 可组合 Composability 本次升级 React Router V4 吸取了 React 的理念:所有的东西都是 Component.因此 升级之后的 Route.Link.Switch……等都是一个普通的组件. React Router V4 基于 Lerna 管理多个 Repository…

If a user has entered some input, or the current Route is in a “dirty” state and we want to confirm that data will be lost, React Router v4 provides a Prompt component to interrupt the Route transition and ask the user a question. For example we need…

Overriding a browser's current location without breaking the back button or causing an infinite redirect can be tricky sometimes. In this lesson we'll learn how React Router v4 allows us to easily achieve a redirect without getting bogged down in bro…

We often want to render a Route conditionally within our application. In React Router v4, the Route components match the current route inclusively so a “stack” of Routes will all be processed. To render a single Route exclusively we can wrap them in…

There are many cases where we will need a catch-all route in our web applications. This can include 404-style routes when nothing is match or other use cases where where we receive an invalid route in React Router v4. We can use 'Switch' from 'react-…

With React Router v4 the entire library is built as a series of React components. That means that creating nested Routes is as simple as creating any other nested element in your application. Parent route: <NavLink to="/menu">Menu</NavL…

React Router v4 ignores query parameters entirely. That means that it is up to you to parse them so that you can use that additional information as required. There are several strategies for doing this that we will look at. There are tow ways to pass…