[javascript] how to download file in react js

I receive file url as response from api. when user clicks on download button, the file should be downloaded without opening file preview in a new tab. How to achieve this in react js?

browsers are smart enough to detect the link and downloading it directly when clicking on an anchor tag without using the download attribute.

after getting your file link from the api, just use plain javascript by creating anchor tag and delete it after clicking on it dynamically immediately on the fly.

const link = document.createElement('a');
link.href = `your_link.pdf`;
document.body.appendChild(link);
link.click();
document.body.removeChild(link);

You can define a component and use it wherever.

import React from 'react';
import PropTypes from 'prop-types';


export const DownloadLink = ({ to, children, ...rest }) => {

  return (
    <a
      {...rest}
      href={to}
      download
    >
      {children}
    </a>
  );
};


DownloadLink.propTypes = {
  to: PropTypes.string,
  children: PropTypes.any,
};

export default DownloadLink;

We can user react-download-link component to download content as File.

<DownloadLink
label="Download"
filename="fileName.txt"
exportFile={() => "Client side cache data here…"}/>

https://frugalisminds.com/how-to-download-file-in-react-js-react-download-link/

Download file

For downloading you can use multiple ways as been explained above, moreover I will also provide my strategy for this scenario.

1. npm install --save react-download-link
2. import DownloadLink from "react-download-link";
3. React download link for client side cache data

   <DownloadLink 
       label="Download" 
       filename="fileName.txt"
       exportFile={() => "Client side cache data here…"}
   />
   

4. Download link for client side cache data with Promises

   <DownloadLink
       label="Download with Promise"
       filename="fileName.txt"
       exportFile={() => Promise.resolve("cached data here …")}
   />
   

5. Download link for data from URL with Promises Function to Fetch data from URL

    getDataFromURL = (url) => new Promise((resolve, reject) => {
       setTimeout(() => {
           fetch(url)
               .then(response => response.text())
               .then(data => {
                   resolve(data)
               });
       });
   }, 2000);
   

6. DownloadLink component calling Fetch function

   <DownloadLink
         label=”Download”
         filename=”filename.txt”
         exportFile={() => Promise.resolve(this. getDataFromURL (url))}
   />
   

Happy coding! ;)

Solution (Work Perfect for React JS, Next JS)

You can use js-file-download and this is my example:

import axios from 'axios'
import fileDownload from 'js-file-download'
 
...

handleDownload = (url, filename) => {
  axios.get(url, {
    responseType: 'blob',
  })
  .then((res) => {
    fileDownload(res.data, filename)
  })
}
 
...

<button onClick={() => {this.handleDownload('https://your-website.com/your-image.jpg', 'test-download.jpg')
}}>Download Image</button>

This plugin can download excel and other file types.

You can use FileSaver.js to achieve this goal:

const saveFile = () => {
fileSaver.saveAs(
  process.env.REACT_APP_CLIENT_URL + "/resources/cv.pdf",
  "MyCV.pdf"
);

};

<button className="cv" onClick={saveFile}>
    Download File
</button>

If you are using React Router, use this:

<Link to="/files/myfile.pdf" target="_blank" download>Download</Link>

Where /files/myfile.pdf is inside your public folder.

This is not related to React. However, you can use the download attribute on the anchor <a> element to tell the browser to download the file.

<a href='/somefile.txt' download>Click to download</a>

This is not supported on all browsers: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/a

React gives a security issue when using a tag with target="_blank".

I managed to get it working like that:

<a href={uploadedFileLink} target="_blank" rel="noopener noreferrer" download>
   <Button>
      <i className="fas fa-download"/>
      Download File
   </Button>
</a>

I have the exact same problem, and here is the solution I make use of now: (Note, this seems ideal to me because it keeps the files closely tied to the SinglePageApplication React app, that loads from Amazon S3. So, it's like storing on S3, and in an application, that knows where it is in S3, relatively speaking.

Steps

3 steps:

1. Make use of file saver in project: npmjs/package/file-saver (npm install file-saver or something)
2. Place the file in your project You say it's in the components folder. Well, chances are if you've got web-pack it's going to try and minify it.(someone please pinpoint what webpack would do with an asset file in components folder), and so I don't think it's what you'd want. So, I suggest to place the asset into the public folder, under a resource or an asset name. Webpack doesn't touch the public folder and index.html and your resources get copied over in production build as is, where you may refer them as shown in next step.
3. Refer to the file in your project Sample code:

   import FileSaver from 'file-saver';
   FileSaver.saveAs(
       process.env.PUBLIC_URL + "/resource/file.anyType",
       "fileNameYouWishCustomerToDownLoadAs.anyType");
   

Source

• Create-React-App.dev | Using the public folder
• Github | File saver documentation

Appendix

• I also try Link component of react-router react-router-docs/Link. The zip file would download, and somehow would unzip properly. Generally, links have blue color, to inherit parent color scheme, simply add a prop like: style={color: inherit} or simply assign a class of your CSS library like button button-primary or something if you're Bootstrappin'
• Other sage questions it's closely related to:
  • download file in react
  • how to download file in react js
  • button to download a file in reactJS
  • download sample file in public folder (react)

This is how I did it in React:

import MyPDF from '../path/to/file.pdf';
<a href={myPDF} download="My_File.pdf"> Download Here </a>

It's important to override the default file name with download="name_of_file_you_want.pdf" or else the file will get a hash number attached to it when you download.

tldr; fetch the file from the url, store it as a local Blob, inject a link element into the DOM, and click it to download the Blob

I had a PDF file that was stored in S3 behind a Cloudfront URL. I wanted the user to be able to click a button and immediately initiate a download without popping open a new tab with a PDF preview. Generally, if a file is hosted at a URL that has a different domain that the site the user is currently on, immediate downloads are blocked by many browsers for user security reasons. If you use this solution, do not initiate the file download unless a user clicks on a button to intentionally download.

In order to get by this, I needed to fetch the file from the URL getting around any CORS policies to save a local Blob that would then be the source of the downloaded file. In the code below, make sure you swap in your own fileURL, Content-Type, and FileName.

fetch('https://cors-anywhere.herokuapp.com/' + fileURL, {
    method: 'GET',
    headers: {
      'Content-Type': 'application/pdf',
    },
  })
  .then((response) => response.blob())
  .then((blob) => {
    // Create blob link to download
    const url = window.URL.createObjectURL(
      new Blob([blob]),
    );
    const link = document.createElement('a');
    link.href = url;
    link.setAttribute(
      'download',
      `FileName.pdf`,
    );

    // Append to html link element page
    document.body.appendChild(link);

    // Start download
    link.click();

    // Clean up and remove the link
    link.parentNode.removeChild(link);
  });

This solution references solutions to getting a blob from a URL and using a CORS proxy.

Update As of January 31st, 2021, the cors-anywhere demo hosted on Heroku servers will only allow limited use for testing purposes and cannot be used for production applications. You will have to host your own cors-anywhere server by following cors-anywhere or cors-server.