我正在尝试为反应路由器4进行正则表达式模式匹配,但不幸的是this.props.match.params.id没有正确解析路径,并显示为未定义.
我希望能够访问的路径示例:
> / gps
> / gps / air
> / gps / a0b6dc45-11a1-42c5-afdb-a62822d109dc
> / gps / air / a0b6dc45-11a1-42c5-afdb-a62822d109dc
我的组件:
import React from "react";
import PropTypes from "prop-types";
import { withRouter, } from "react-router";
import { Switch, Route } from "react-router-dom";
class Foo extends React.Component {
render(){
console.log(this.props.match);
return <div>Match: {this.props.match.params.id}</div>
}
}
const industryRegex = "(air|motor|ship)";
const guidRegex = "([0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12})?"; // Note the questionmark ? at the end
const pathId = `/gps/:id${guidRegex}`;
const pathIndustry = `/gps/:industryType${industryRegex}`;
const pathIndustryAndId = `/gps/:industryType${industryRegex}/:id${guidRegex}`;
console.log(pathId);
console.log(pathIndustry);
console.log(pathIndustryAndId);
const AppComponent = ({...props}) => {
return (
<Switch>
<Route path={pathId} component={Foo} />
<Route path={pathIndustry} component={Foo} />
<Route path={pathIndustryAndId} component={Foo} />
</Switch>
)
};
export default withRouter(AppComponent);
尝试以下路径/ gps / a0b6dc45-11a1-42c5-afdb-a62822d109dc会导致this.props.match.params.id未定义.
任何帮助非常感谢
最佳答案 您在行业正则表达式末尾错过了一个问号,将其标记为通过案例3的选项.否则,您的正则表达式适用于您所述的所有案例.
固定的正则表达式应如下所示:/ gps /:industryType(air | motor | ship)?/:id([0-9a-f] {8} – [0-9a-f] {4} – [1- 5] [0-9A-F] {3} – [89ab] [0-9A-F] {3} – [0-9A-F] {12})?
专业提示:对于react路由器4,您可以在此处测试正则表达式并验证所有用例:https://pshrmn.github.io/route-tester/