ReactRouter升级 v2 to v4
概述
react-router V4 相对于react-router V2 or V3 几乎是重写了, 新版的react-router更偏向于组件化(everything is component)。
V4
汲取了很多思想,路由即是组件,使路由更具声明式,且方便组合。如果你习惯使用react
,那么一定会很快上手新版的react-router
。
react-router V4 被一分为三: react-router-dom
(for web)、react-router-native
(for native)、react-router
(core)。但如果仅在浏览器中使用的话,一般只需要用到react-router-dom
就可以了。
改动点
1. Router/Route 的改变
// V2 or V3
import { Router, Route, hashHistory } from 'react-router';
<Router history={hashHistory}>
<Route path='/foo' component={Foo} />
<Route path='/bar' component={Bar} />
</Router>
// V4 Router组件里只能渲染一个组件
import {
HashRouter as Router,
Route
} from 'react-router-dom';
<Router>
<div>
<Route path='/foo' component={Foo} />
<Route path='/bar' component={Bar} />
</div>
</Router>
2. 组件嵌套
// V2 or V3 路由组件嵌套
import { Router, Route, hashHistory } from 'react-router';
<Router history={hashHistory}>
<Route path='/' component={App}>
<Route path='foo' component={Foo} />
<Route path='bar' component={Bar} />
</Route>
</Router>
// V4 Router 的路由组件嵌套
import {
HashRouter as Router,
Route,
Switch
} from 'react-router-dom';
<Router>
<Route path="/" component={(props) => (
<App {...props}>
<Switch>
<Route path='/foo' component={Foo} />
<Route path='/bar' component={Bar} />
</Switch>
</App>
)}/>
</Router>
3. 路由的生命周期
在react-router V4
中去掉了on****
的路由生命周期的钩子,但是你可以在组件中用componentDidMount
或 componentWillMount
代替 onEnter
,可以用componentWillUpdate
或 componentWillReceiveProps
代替 onUpdate
,你可以用componentWillUnmount
代替 onLeave
。
4. Link
// V2 or V3
import { Link } from 'react-router';
// V4
import { Link } from 'react-router-dom';
5. history.push and history.replace
// V2 or V3
history.push({
pathname: '/home',
query: {
foo: 'test',
bar: 'temp'
}
});
history.replace({
pathname: '/home',
query: {
foo: 'test',
bar: 'temp'
}
});
// V4
history.push({
pathname: '/home',
search: '?foo=test&bar=temp',
});
history.replace({
pathname: '/home',
search: '?foo=test&bar=temp',
});
6. props.params
// V2 or V3 获取params可以这么获取
this.props.params
// V4
this.props.match.params
7. location.query
// V2 or V3 获取query可以这么获取
this.props.location.query
// V4 去掉了location.query,只能使用search来获取,为了让其跟浏览器一样
// 如果想要兼容以前的location.query,可以使用query-string库解析一下
// 如: queryString.parse(props.location.search)
this.props.location.search
8. location.action
// V2 or V3 获取location的action
this.props.location.action
// V4 去掉了location.action, 放在了history里面
history.action
9.关于history
以前获取react-router里面的history库,可以这么获取:
import {hashHistory as history} from 'react-router';
react-router V4:
import createHashHistory as history from 'history/createHashHistory';
兼容处理
因为要从react-router V2
完全迁移到react-router V4
工作量还是挺大的,一下子难以完全迁移,所以对某些地方做了兼容处理。
history
import _ from 'lodash';
import queryString from 'query-string';
function processHistory(history) {
const _push = history.push;
const _replace = history.replace;
history.push = function (one) {
if (!_.isPlainObject(one)) {
return _push.apply(this, arguments);
}
const o = Object.assign({}, one);
if (o.query) {
o.search = queryString.stringify(o.query);
}
_push.apply(this, [o]);
};
history.replace = function (one) {
if (!_.isPlainObject(one)) {
return _replace.apply(this, arguments);
}
const o = Object.assign({}, one);
if (o.query) {
o.search = queryString.stringify(o.query);
}
_replace.apply(this, [o]);
};
return history;
}
export default processHistory;
props
import queryString from 'query-string';
const processReactRouterProps = (props) => {
const newProps = Object.assign({}, props);
newProps.location.query = queryString.parse(props.location.search);
newProps.location.action = newProps.history.action;
newProps.params = props.match.params || {}; // 不止 || 是否有意义
return newProps;
}
export default processReactRouterProps;
参考资料: