javascript - 单击 ReactJs 中表格行中的链接时如何在不同页面中呈现组件

Question

我是 ReactJs 的初学者，我有一个包含 html 表格的 ProjectsList 组件。其中一列是一个链接，单击该链接时必须导航到呈现 ProjectInfo 组件的不同页面。

但是，发生的情况是该组件呈现在表末尾的 ProjectsList 组件的同一页面中。ProjectsList 组件在单击 Projects 组件中的链接 Show Projects 时呈现。

Projects.component.jsx

import React, { Component } from "react";
import { Link, Route, Switch } from "react-router-dom";
import NewProject from "../NewProject/NewProject.component";
import ProjectsList from "../ProjectsList/ProjectsList.component";
import "./Projects.css";

export default class Projects extends Component {
  render() {
    return (
      <div className="projects-dashboard">
        <nav className="nav-up">
          <ul>
            <li>
              <Link to={"/dashboard/projects/add"}>add project</Link>
            </li>

            <li>
              <Link to={"/dashboard/projects/list"}>show projects</Link>
            </li>
          </ul>
        </nav>
        <main>
          <Route path={"/dashboard/projects/add"} component={NewProject} />
          <Route path={"/dashboard/projects/list"} component={ProjectsList} />
        </main>
      </div>
    );
  }
}

ProjectsList.component.jsx

import React, { Component } from "react";
import axios from "axios";
import { Route, Link } from "react-router-dom";
import "./ProjectsList.css";
import ProjectInfo from "../ProjectInfo/ProjectInfo.component";

export default class ProjectsList extends Component {
  constructor(props) {
    super(props);
    this.state = {
      allProject: []
    }
  }

  componentWillMount() {
    this.fetchAllProjects();
  }

  componentDidMount() {
    document.body.style.overflowY = "auto";
  }

  fetchAllProjects = () => {
    axios.get("/api/projects").then(res => {
      this.setState({ allProject: res.data }, () => { console.log(this.state.allProject); });
    });
  };

  render() {
    const projects = this.state.allProject.map(project => {
      return (
        <tr>
          <td>{project.id}</td>
          <td>{project.title}</td>
          <td>{project.organization_name}</td>
          <td className="project-options">
            <Link to={`/dashboard/projects/list/${project.id}`}>
              <i className="far fa-eye" /> show
            </Link>
          </td>
        </tr>
      );
    });

    return (
      <div>
        <table class="projects-list-table">
          <thead>
            <tr>
              <th>
                <h1>Project ID</h1>
              </th>
              <th>
                <h1>Project Name</h1>
              </th>
              <th>
                <h1>Organization Name</h1>
              </th>
              <th>
                <h1>Options</h1>
              </th>
            </tr>
          </thead>
          <tbody>{projects}</tbody>
        </table>
        <main>
          <Route path={"/dashboard/projects/list/:id"} component={ProjectInfo} />
        </main>
      </div>
    );
  }
}

ProjectInfo.component.jsx

import React, { Component } from 'react';
import "./ProjectInfo.css";

export default class ProjectInfo extends Component {
    render() {
        return (
            <div>
                <h1>Project Info Component</h1>
            </div>
        )
    }
}

Answer 1

React router 将那些组件包含到 Route 标签所在的指定部分。例如:

<section>
  <h1>Hello</h1>
  <Route path={"/random/path"} component={MyComponent} />
</section>

会回来

<section>
  <h1>Hello</h1>
  <MyComponent />
</section>

要解决这个问题，您需要将它添加到与 ProjectList 路由相同的路由级别。

所以改变这个

<main>
  <Route path={"/dashboard/projects/add"} component={NewProject} />
  <Route path={"/dashboard/projects/list"} component={ProjectsList} />
</main>

到

<main>
  <Route path={"/dashboard/projects/add"} component={NewProject} />
  <Route exact path={"/dashboard/projects/list"} component={ProjectsList} />
  <Route exact path={"/dashboard/projects/list/:id"} component={ProjectInfo} />
</main>

编辑

最后一条路线不应该有确切的标签

<main>
  <Route path={"/dashboard/projects/add"} component={NewProject} />
  <Route exact path={"/dashboard/projects/list"} component={ProjectsList} />
  <Route path={"/dashboard/projects/list/:id"} component={ProjectInfo} />
</main>