我有以下结构为我的React.js应用程序使用React路由器:
var Dashboard = require('./Dashboard');
var Comments = require('./Comments');
var Index = React.createClass({
render: function () {
return (
<div>
<header>Some header</header>
<RouteHandler />
</div>
);
}
});
var routes = (
<Route path="/" handler={Index}>
<Route path="comments" handler={Comments}/>
<DefaultRoute handler={Dashboard}/>
</Route>
);
ReactRouter.run(routes, function (Handler) {
React.render(<Handler/>, document.body);
});
我想把一些属性传递给Comments组件。
(通常我会这样做,如<Comments myprop="value" />)
用React路由器最简单和正确的方法是什么?
使用自定义路由组件,这在React Router v3中是可能的。
var Dashboard = require('./Dashboard');
var Comments = require('./Comments');
var routes = (
<Route path="/" handler={Index}>
<MyRoute myprop="value" path="comments" handler={Comments}/>
<DefaultRoute handler={Dashboard}/>
</Route>
);
对于<MyRoute>组件代码,它应该类似于:
import React from 'react';
import { Route } from 'react-router';
import { createRoutesFromReactChildren } from 'react-router/lib//RouteUtils';
const MyRoute = () => <div><MyRoute> elements are for configuration only and should not be rendered</div>;
MyRoute.createRouteFromReactElement = (element, parentRoute) => {
const { path, myprop } = element.props;
// dynamically add crud route
const myRoute = createRoutesFromReactChildren(
<Route path={path} />,
parentRoute
)[0];
// higher-order component to pass myprop as resource to components
myRoute.component = ({ children }) => (
<div>
{React.Children.map(children, child => React.cloneElement(child, { myprop }))}
</div>
);
return myRoute;
};
export default MyRoute;
有关自定义路由组件方法的更多详细信息,请查看我关于该主题的博客文章:http://marmelab.com/blog/2016/09/20/custom-react-router-component.html
对于react路由器2.x。
const WrappedComponent = (Container, propsToPass, { children }) => <Container {...propsToPass}>{children}</Container>;
在你的路线上…
<Route path="/" component={WrappedComponent.bind(null, LayoutContainer, { someProp })}>
</Route>
确保第3个参数是一个类似于:{checked: false}的对象。
更新
自新版本以来,可以直接通过Route组件传递道具,而不使用Wrapper。例如,通过使用渲染道具。
组件:
class Greeting extends React.Component {
render() {
const {text, match: {params}} = this.props;
const {name} = params;
return (
<React.Fragment>
<h1>Greeting page</h1>
<p>
{text} {name}
</p>
</React.Fragment>
);
}
}
用法:
<Route path="/greeting/:name" render={(props) => <Greeting text="Hello, " {...props} />} />
Codesandbox例子
旧版本
我更喜欢的方法是包装Comments组件,并将包装器作为路由处理程序传递。
这是应用更改后的示例:
var Dashboard = require('./Dashboard');
var Comments = require('./Comments');
var CommentsWrapper = React.createClass({
render: function () {
return (
<Comments myprop="myvalue"/>
);
}
});
var Index = React.createClass({
render: function () {
return (
<div>
<header>Some header</header>
<RouteHandler/>
</div>
);
}
});
var routes = (
<Route path="/" handler={Index}>
<Route path="comments" handler={CommentsWrapper}/>
<DefaultRoute handler={Dashboard}/>
</Route>
);
ReactRouter.run(routes, function (Handler) {
React.render(<Handler/>, document.body);
});