download-prog

Download Progress

A small, low-level library to create awesome file download progress bars.

How to start?

• Install using npm npm install download-progress
• If using ECMAScript 6 then import DownloadProgress from 'download-progress' then DownloadProgress(filesToLoad)
• If using ECMAScript 5 then include <script src="[PATH-TO-FILE]/download-progress.js"></script> in the head of your index.html then DownloadProgress(filesToLoad)

How to use?

//set up the library
var files = ['myJS.js','myCSS.css','myText.txt'];
var dp = DownloadProgress(files);

//add event listeners
dp.on('progress',function(e){
    console.log(e.detail + ' combined percentage loaded!');
}).on('afterLoading',function(e){
    console.log(e.detail.url + ' is completely loaded!');
    console.log(e.detail.response); //this is the content of the loaded file
});

//initialize
dp.init();

Methods

• on: Attaches a callback to one of the events
• init: Initializes the loading process

Events

• beforeLoading: Dispatches right before the download process starts
• afterLoading: Dispatches once after each url is completely loaded
• progress: Dispatches when the progress value (the percentage) changes

NOTE

For seeing the progress of gzip files you need to set a header for the file in the backend api called x-decompressed-content-length so that Download Progress can get the uncompressed file size and calculate the progress.

Feel free to contribute, leave suggestion or issues.

License

This project is licensed under the MIT License.