JavaScript File Downloader

JavaScript File Downloader is an open-source library that allows you to download files from a given URL in JavaScript. This library can be used with any JavaScript framework.

Getting Started

Prerequisites

• A web browser that supports ECMAScript 6 (ES6)

Installation

To use JavaScript File Downloader in your project, you can download the jsFileDownloader.js file and include it in your project. Alternatively, you can install it using npm:

1npm i js-file_downloader--emon --save

1yarn add js-file_downloader--emon

Importing

import jsFileDownloader from "js-file_downloader--emon";

How to use it in your project

use this function in click event or any event

1jsFileDownloader(url, fileName);

if you want to see the progress of the download, you can pass a function as the third parameter

1jsFileDownloader(url, fileName, (progress) => {
2  console.log(progress);
3});

if you want to use it with async/await

1try {
2  const response = await jsFileDownloader(url, name, (progress) => {
3    console.log(progress);
4  });
5  console.log(response);
6} catch (error) {
7  console.log(error);
8}

if you want to use it with promise

1jsFileDownloader(url, name, (progress) => {
2  console.log(progress);
3})
4  .then((response) => {
5    console.log(response);
6  })
7  .catch((error) => {
8    console.log(error);
9  });

Parameters

Parameter	Type	Description
url*	string(required)	The URL of the file to be downloaded
fileName	string	The name with which the downloaded file will be saved
progress	function	A function that will be called with the download progress

Functionality

• Tries to download a file from the given URL
• Checks if the url contains "http://" and replaces it with "https://"
• Initializes the necessary variables and arrays
• Reads the response body in chunks
• Calculates the download progress and calls the progress function with the progress value
• Combines the chunks and creates a blob URL
• Creates a link element, assigns the blob URL and file name, and clicks on it to download the file
• Revokes the blob URL

Returns

• If successful, returns the downloaded file
• If an error occurs, returns the error message.

Response

Status	Description
200	OK
400	URL is required/URL is not valid

License

This project is licensed under the MIT License - see the LICENSE.md file for details

Author

• [Md Wahiduzzaman Emon]

Contributing

• Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

• Please make sure to update tests as appropriate.