Question

我有一个问题，我正在创建一个使用Express的项目，但我不知道如何运行该项目，我尝试使用concurrently但是失败了......

我想要的是获取网址http://localhost:9000/people的名称（由express.js生成）并在persons中插入this.state。

有人可以帮助我吗？

我的package.json：

{
  "name": "myapp",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "axios": "^0.18.0",
    "express": "^4.16.3",
    "react": "^16.3.1",
    "react-dom": "^16.3.1",
    "react-scripts": "1.1.4"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test --env=jsdom",
    "eject": "react-scripts eject"
  },
  "proxy": "http://localhost:9000"
}

我的app.js axios.js：

import React, { Component } from 'react';
const axios = require("axios");

class App extends Component {
  constructor(props) {
    super(props);

    this.state = {
      elementsPerPage: 15,
      currentPage: 0,
      persons: [],
    };
  }

  componentDidMount() {
    axios.get("http://localhost:9000/person").then(res => {
      this.setState({persons: res.data})})
  }
  ....

我的express.js：

const express = require('express');

const app = express();

app.get('/person', (req, res) => {
  res.send([{ id: 0, name: "123" },
    { id: 1, name: "123" },
    { id: 2, name: "123" },
    { id: 3, name: "123" },
    { id: 4, name: "123" },
    { id: 5, name: "123" },
    { id: 6, name: "123" },
    { id: 7, name: "123" },
    { id: 8, name: "123" },
    { id: 9, name: "123" },
    { id: 10, name: "123" },
    { id: 11, name: "123" }]
)
});



app.listen(9000, () => console.log('Running server on 9000'));

已经尝试npm run dev npm start而不是。

Answer 1

试试这个

componentDidMount() {
axios.get("/people").then(res => { //dont use full address
  this.setState({peoples: res.data})})
}

如果这不起作用，请尝试遵循本教程How to get create-react-app to work with a Node.js back-end API

如何使用Express.js和Axios.js运行项目React？

1 个答案: