dwnld-attr-polyfill

GitHub | NPM | @jelmerdemaat

Will polyfill the functionality of the download attribute:

                          ↓ ↓ ↓
<a href="/somefile.pdf" download>
    Download this (don't navigate to it)
</a>

in IE11, which doesn't support it. This polyfill is small and works fast.

Usage

Install using npm:

npm i -S dwnld-attr-polyfill

And include it in your JavaScript somewhere:

import 'dwnld-attr-polyfill';

This polyfill automatically does its work. It will:

1. Detect if polyfilling is needed (and otherwise won't do anything)
2. Detect on click if it's on a link with the download attribute
3. Prevent their default behaviour
4. Via an XMLHttpRequest, request the resource and create a blob of data
5. Instruct IE11 to download that data using msSaveBlob

Why didn't you just use the word 'download' in the package name?

Because npm doesn't allow that:

$ npm publish
npm ERR! 400 Bad Request - PUT https://registry.npmjs.org/download-attr-polyfill - That word is not allowed. Please contact support (support@npmjs.com) if you believe you received this in error.