Question

这是我第一次开发React应用程序。

我将使用axios的get响应来填充表。外部变量是在axios范围之外声明和使用的。

有没有办法在全局范围之外/外部使用axios的get响应？

非常感谢您的帮助。

const getServerData = async ({ filters, sortBy, pageSize, pageIndex }) => {
  await new Promise(resolve => setTimeout(resolve, 500));

let rows = [];

  axios
    .get(`url here`)
    .then(res => {
      console.log(res.data);
     }
    });


  //access res outside scope - is this possible?
  rows.push({res.data});

Answer 1

const getServerData =异步（{过滤器，sortBy，pageSize，pageIndex}）=> { 等待新的Promise（resolve => setTimeout（resolve，500））;

let responseData = {};

让行= [];

axios .get（url here） .then（res => responseData = res.data）;

//访问范围以外的资源-通过创建全局变量并在范围内为其分配值，可以实现该操作。

rows.push（{responseData}）;

Answer 2

您应该使用某种形式的状态来跟踪行。

import React, { useState, useEffect } from "react";
import axios from 'axios';

import "./styles.css";

function App() {
  // Initialize a rows state variable that will be set to [] on the initial load.
  const [rows, setRows] = useState([])

  useEffect(() => {
    // Fetch the data when the component is mounted
    axios
      .get(`url here`)
      .then(res => {
        // Store the response (the rows) in the state variable.
        setRows(res)
      })
  }, [])

  /*
   * On the initial mount nothing will be rendered, when the rows variable
   * is updated a re-render will be triggered and your rows can be rendered.
   */
  return (
    <div>
     { rows.map(row => <tr>A row!</tr>) }
    </div>
  );
}

我建议阅读https://reactjs.org/docs/state-and-lifecycle.html

在React中访问响应数据超出axios范围的方法

2 个答案: