如何使用JavaScript中的Fetch下载Json? [英] How do download of Json using Fetch in JavaScript?

问题描述

如何从Fetch URL下载所需的JSON?

how do download of a JSON required from Fetch URL?

下载文件位于XLSX中.

Download is in XLSX.

CODE

function teste (){

alert(fetch ("url")        
.then(response => response.json())
.then(data => { console.log(data)})
     .then(response => response.blob())
        .then(blob => {
            var url = window.URL.createObjectURL(blob);
            var a = document.createElement('a');
            a.href = url;
            a.download = "filename.xlsx";
            a.click();                    
        })
)
}

推荐答案

从.then()中删除alert()，return值.注意Response只能读取一次

Remove alert(), return value from .then(). Note Response can only be read once

function teste() {   
  fetch("url")
    .then(async(response) => {
      let clone = response.clone();
      let res = await clone.json();
      console.log(res);
      return response.blob()
    })
    .then(blob => {
      var url = window.URL.createObjectURL(blob);
      var a = document.createElement('a');
      a.href = url;
      a.download = "filename.xlsx";
      a.click();
    })
    .catch(function(err) {
      console.error(err)
    })
}

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