ReferenceError: fetch 未定义 [英] ReferenceError: fetch is not defined

问题描述

我在 node.js 中编译代码时出现此错误，我该如何解决?

I have this error when I compile my code in node.js, how can I fix it?

ReferenceError: fetch 未定义

RefernceError: fetch is not defined

这是我正在做的功能，它负责从特定的电影数据库中恢复信息.

This is the function I am doing, it is responsible for recovering information from a specific movie database.

function getMovieTitles(substr){  
  pageNumber=1;
  let url = 'https://jsonmock.hackerrank.com/api/movies/search/?Title=' + substr + "&page=" + pageNumber;
  fetch(url).then((resp) => resp.json()).then(function(data) {
    let movies = data.data;
    let totPages = data.total_pages;
    let sortArray = [];
    for(let i=0; i<movies.length;i++){
        sortArray.push(data.data[i].Title);
     }
    for(let i=2; i<=totPages; i++){
           let newPage = i;
           let url1 = 'https://jsonmock.hackerrank.com/api/movies/search/?Title=' + substr + "&page=" + newPage;

          fetch(url1).then(function(response) {
              var contentType = response.headers.get("content-type");
              if(contentType && contentType.indexOf("application/json") !== -1) {
                return response.json().then(function(json) {
                  //console.log(json); //uncomment this console.log to see the JSON data.

                 for(let i=0; i<json.data.length;i++){
                    sortArray.push(json.data[i].Title);
                 }

                 if(i==totPages)console.log(sortArray.sort());

                });
              } else {
                console.log("Oops, we haven't got JSON!");
              }
            });

        }
  })
  .catch(function(error) {
    console.log(error);
  });   
}

推荐答案

fetch API 未在 Node 中实现.

The fetch API is not implemented in Node.

您需要为此使用外部模块，例如 node-fetch.

You need to use an external module for that, like node-fetch.

像这样将其安装在您的 Node 应用程序中

Install it in your Node application like this

npm install node-fetch

然后将下面的行放在您使用 fetch API 的文件的顶部:

then put the line below at the top of the files where you are using the fetch API:

import fetch from "node-fetch";

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