Add simple donate buttons to any website
It seems like a simple thing, yet after a bunch of browsing through /r/bitcoin and basic web searches, I couldn't find anything like it: a quick and easy way to have a "gimme bitcoins" button on a website.
Most sites that solicit donations simply write the address out and expect you to copy/paste it into a desktop bitcoin client in order to make use of it -- hardly reasonable in an age of smart phones where most of us carry are to-use cash in our pockets and our nest-eggs in some form of hard to access storage.
What the community needs is a means of getting a QR code to show up easy for anyone with a phone so they can donate a small amount just by pointing that phone at the screen.
So here's how you do it:
<html>
<head>
<link rel="stylesheet" href="/path/to/css/btcdonate.css">
</head>
<body>
<h1>My Awesome Web Page</h1>
<p>Some stuff on your page and <a href="bitcoin:A_BITCOIN_ADDRESS">a donation link</a></p>
<p>Some more stuff on your page</p>
<p>
Even more stuff on your page and
<a href="bitcoin:ANOTHER_BITCOIN_ADDRESS?amount=0.01">
another donation link, this time with a suggested amount
</a>.
</p>
<script type="text/javascript" src="/path/to/js/jquery.js"></script>
<script type="text/javascript" src="/path/to/js/jquery.qrcode.js"></script>
<script type="text/javascript" src="/path/to/js/btcdonate.js"></script>
<script>
btcdonate();
</script>
</body>
</html>What you end up with is a standard link with an on-mouseover popup containing a
QR code. Just point your phone, and tap "send" in whatever app you're using.
Want the popup effect on an image? It's just like any other <a> tag:
<a href="bitcoin:A_BITCOIN_ADDRESS"><img src="/path/to/image.png" /></a>If you want the onClick event to trigger the typical behaviour of visiting a
web page rather than attempting to handle a bitcoin: link, you can just use
data-btcaddress=MYADDRESS instead:
<a
href="https://blockchain.info/address/A_BITCOIN_ADDRESS"
data-btcaddress="A_BITCOIN_ADDRESS"
>
Some text
</a>To work, bitcoin-donate requires that you load btcdonate.css, but there's
nothing stopping you from adding CSS overrides after that. If for example you
want the background colour of the bubble to be dark grey, you can do this:
<link rel="stylesheet" href="/path/to/css/btcdonate.css">
<style type="text/css">
.btcdonate-bubble {
background: #cccccc;
}
</style>Tweak the css as you see fit. The defaults are just a suggestion.
Bitcoin-donate makes use of jQuery-QRCode
and makes some of the customising features in that library available to you.
Presently, you can fiddle with the fill and radius values to change the
colour and shape of the codes generated:
// Change the fill to deep red and make the QR code corners sharp
btcdonate({
fill: "#990000",
radius: 0
});There's a working demo available here,
or you can just grab this repo and open index.html in the demo directory.
There's some examples in the source of the demo if you want to see what kinds of options you have as a developer using this code.
Bitcoin-donate is licensed under the GPL3, but depends on two other Free software projects jQuery (MIT license) and jQuery-QRCode (as-is license).
This is very young code and has only been tested in Firefox 30+ when interacting with Andreas Schildbach's popular Bitcoin Wallet app available in the Google Play store. If you have tried this out under other circumstances please feel free to say as much in the issue queue and I'll update the status here.
Ironically, GitHub won't let you run javascript, so I can't actually use this module here to solicit donations. However all of the generated QR codes in the demo and this README point to my address, and you can always go old-school and copy/paste: 1BPVHqxcMAdPEtfSHLLPfpqucrDfgCGgD4
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