<h3>クリックやツイートしたときにアラートを出すなどのイベント発生</h3>

純正ボタン
<p><a href="https://twitter.com/share?url=http://codepen.io/s56bouya/pen/gajVjx&amp;text=Twitter button event&amp;hashtags=twitter&amp;via=s56bouya&amp;count=none" class="twitter-share-button">Tweet</a></p>

オリジナルボタン
<p><a class="original" href="https://twitter.com/intent/tweet?url=http://codepen.io/s56bouya/pen/gajVjx&amp;text=Twitter button event&amp;hashtags=twitter&amp;via=s56bouya">Tweet</a></p>

body{
  text-align:center;
  background-color: #F7F6EF;
  background-image:url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0naHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmcnIHhtbG5zOnhsaW5rPSdodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hsaW5rJyB3aWR0aD0nNDkxLjk5OTk5OTk5OTk5OTk0JyBoZWlnaHQ9JzI1Mi4wMDAwMDAwMDAwMDAwMycgdmlld0JveD0nMCAwIDk4LjM5OTk5OTk5OTk5OTk5IDUwLjQwMDAwMDAwMDAwMDAwNic+Cgk8ZGVmcz4KCQk8cGF0aCBpZD0ncycgZmlsbD0nI2ZmZmZmZicgZD0nTTAsMGw4IDRsLTgsNHonLz4KCTwvZGVmcz4KCTxnIGlkPSdiJz4KCTx1c2UgeD0nLTgnIHk9Jy00JyB0cmFuc2Zvcm09J21hdHJpeCgtMSAwIDAgMSAwIDApJyBmaWxsLW9wYWNpdHk9JzAuMycgeGxpbms6aHJlZj0nI3MnIC8+Cgk8dXNlIHg9JzAnIHk9JzAuMicgZmlsbC1vcGFjaXR5PScwLjQ0OTk5OTk5OTk5OTk5OTk2JyB4bGluazpocmVmPScjcycgLz4KCTx1c2UgeD0nLTgnIHk9JzQuNCcgdHJhbnNmb3JtPSdtYXRyaXgoLTEgMCAwIDEgMCAwKScgZmlsbC1vcGFjaXR5PScwLjQ0OTk5OTk5OTk5OTk5OTk2JyB4bGluazpocmVmPScjcycgLz4KCTx1c2UgeD0nMCcgeT0nOC42JyBmaWxsLW9wYWNpdHk9JzAuNDQ5OTk5OTk5OTk5OTk5OTYnIHhsaW5rOmhyZWY9JyNzJyAvPgoJPHVzZSB4PSctOCcgeT0nMTIuOCcgdHJhbnNmb3JtPSdtYXRyaXgoLTEgMCAwIDEgMCAwKScgZmlsbC1vcGFjaXR5PScwLjYnIHhsaW5rOmhyZWY9JyNzJyAvPgoJPHVzZSB4PScwJyB5PScxNycgZmlsbC1vcGFjaXR5PScwLjMnIHhsaW5rOmhyZWY9JyNzJyAvPgoJPHVzZSB4PSctOCcgeT0nMjEuMicgdHJhbnNmb3JtPSdtYXRyaXgoLTEgMCAwIDEgMCAwKScgZmlsbC1vcGFjaXR5PScwLjMnIHhsaW5rOmhyZWY9JyNzJyAvPgoJPHVzZSB4PSc4LjInIHk9Jy00JyBmaWxsLW9wYWNpdHk9JzAuNDQ5OTk5OTk5OTk5OTk5OTYnIHhsaW5rOmhyZWY9JyNzJyAvPgoJPHVzZSB4PSctMTYuMicgeT0nMC4yJyB0cmFuc2Zvcm09J21hdHJpeCgtMSAwIDAgMSAwIDApJyBmaWxsLW9wYWNpdHk9JzAuNicgeGxpbms6aHJlZj0nI3MnIC8+Cgk8dXNlIHg9JzguMicgeT0nNC40JyBmaWxsLW9wYWNpdHk9JzAuNDQ5OTk5OTk5OTk5OTk5OTYnIHhsaW5rOmhyZWY9JyNzJyAvPgoJPHVzZSB4PSctMTYuMicgeT0nOC42JyB0cmFuc2Zvcm09J21hdHJpeCgtMSAwIDAgMSAwIDApJyBmaWxsLW9wYWNpdHk9JzAuMycgeGxpbms6aHJlZj0nI3MnIC8+Cgk8dXNlIHg9JzguMicgeT0nMTIuOCcgZmlsbC1vcGFjaXR5PScwLjE1JyB4bGluazpocmVmPScjcycgLz4KCTx1c2UgeD0nLTE2LjInIHk9JzE3JyB0cmFuc2Zvcm09J21hdHJpeCgtMSAwIDAgMSAwIDApJyBmaWxsLW9wYWNpdHk9JzAuMycgeGxpbms6aHJlZj0nI3MnIC8+Cgk8dXNlIHg9JzguMicgeT0nMjEuMicgZmlsbC1vcGFjaXR5PScwLjQ0OTk5OTk5OTk5OTk5OTk2JyB4bGluazpocmVmPScjcycgLz4KCTx1c2UgeD0nLTI0LjQnIHk9Jy00JyB0cmFuc2Zvcm09J21hdHJpeCgtMSAwIDAgMSAwIDApJyBmaWxsLW9wYWNpdHk9JzAuMycgeGxpbms6aHJlZj0nI3MnIC8+Cgk8dXNlIHg9JzE2LjQnIHk9JzAuMicgZmlsbC1vcGFjaXR5PScwLjMnIHhsaW5rOmhyZWY9JyNzJyAvPgoJPHVzZSB4PSctMjQuNCcgeT0nNC40JyB0cmFuc2Zvcm09J21hdHJpeCgtMSAwIDAgMSAwIDApJyBmaWxsLW9wYWNpdHk9JzAuNDQ5OTk5OTk5OTk5OTk5OTYnIHhsaW5rOmhyZWY9JyNzJyAvPgoJPHVzZSB4PScxNi40JyB5PSc4LjYnIGZpbGwtb3BhY2l0eT0nMC4zJyB4bGluazpocmVmPScjcycgLz4KCTx1c2UgeD0nLTI0LjQnIHk9JzEyLjgnIHRyYW5zZm9ybT0nbWF0cml4KC0xIDAgMCAxIDAgMCknIGZpbGwtb3BhY2l0eT0nMC4xNScgeGxpbms6aHJlZj0nI3MnIC8+CQoJPHVzZSB4PScxNi40JyB5PScxNycgZmlsbC1vcGFjaXR5PScwLjMnIHhsaW5rOmhyZWY9JyNzJyAvPgoJPHVzZSB4PSctMjQuNCcgeT0nMjEuMicgdHJhbnNmb3JtPSdtYXRyaXgoLTEgMCAwIDEgMCAwKScgZmlsbC1vcGFjaXR5PScwLjMnIHhsaW5rOmhyZWY9JyNzJyAvPgoJPHVzZSB4PScyNC41OTk5OTk5OTk5OTk5OTgnIHk9Jy00JyBmaWxsLW9wYWNpdHk9JzAuMycgeGxpbms6aHJlZj0nI3MnIC8+Cgk8dXNlIHg9Jy0zMi41OTk5OTk5OTk5OTk5OTQnIHk9JzAuMicgdHJhbnNmb3JtPSdtYXRyaXgoLTEgMCAwIDEgMCAwKScgZmlsbC1vcGFjaXR5PScwLjMnIHhsaW5rOmhyZWY9JyNzJyAvPgoJPHVzZSB4PScyNC41OTk5OTk5OTk5OTk5OTgnIHk9JzQuNCcgZmlsbC1vcGFjaXR5PScwLjE1JyB4bGluazpocmVmPScjcycgLz4KCTx1c2UgeD0nLTMyLjU5OTk5OTk5OTk5OTk5NCcgeT0nOC42JyB0cmFuc2Zvcm09J21hdHJpeCgtMSAwIDAgMSAwIDApJyBmaWxsLW9wYWNpdHk9JzAuNDQ5OTk5OTk5OTk5OTk5OTYnIHhsaW5rOmhyZWY9JyNzJyAvPgoJPHVzZSB4PScyNC41OTk5OTk5OTk5OTk5OTgnIHk9JzEyLjgnIGZpbGwtb3BhY2l0eT0nMC40NDk5OTk5OTk5OTk5OTk5NicgeGxpbms6aHJlZj0nI3MnIC8+Cgk8dXNlIHg9Jy0zMi41OTk5OTk5OTk5OTk5OTQnIHk9JzE3JyB0cmFuc2Zvcm09J21hdHJpeCgtMSAwIDAgMSAwIDApJyBmaWxsLW9wYWNpdHk9JzAuMTUnIHhsaW5rOmhyZWY9JyNzJyAvPgoJPHVzZSB4PScyNC41OTk5OTk5OTk5OTk5OTgnIHk9JzIxLjInIGZpbGwtb3BhY2l0eT0nMC4zJyB4bGluazpocmVmPScjcycgLz4KCTx1c2UgeD0nLTQwLjgnIHk9Jy00JyB0cmFuc2Zvcm09J21hdHJpeCgtMSAwIDAgMSAwIDApJyBmaWxsLW9wYWNpdHk9JzAuNDQ5OTk5OTk5OTk5OTk5OTYnIHhsaW5rOmhyZWY9JyNzJyAvPgkKCTx1c2UgeD0nMzIuOCcgeT0nMC4yJyBmaWxsLW9wYWNpdHk9JzAuNicgeGxpbms6aHJlZj0nI3MnIC8+Cgk8dXNlIHg9Jy00MC44JyB5PSc0LjQnIHRyYW5zZm9ybT0nbWF0cml4KC0xIDAgMCAxIDAgMCknIGZpbGwtb3BhY2l0eT0nMC4xNScgeGxpbms6aHJlZj0nI3MnIC8+Cgk8dXNlIHg9JzMyLjgnIHk9JzguNicgZmlsbC1vcGFjaXR5PScwLjMnIHhsaW5rOmhyZWY9JyNzJyAvPgoJPHVzZSB4PSctNDAuOCcgeT0nMTIuOCcgdHJhbnNmb3JtPSdtYXRyaXgoLTEgMCAwIDEgMCAwKScgZmlsbC1vcGFjaXR5PScwLjQ0OTk5OTk5OTk5OTk5OTk2JyB4bGluazpocmVmPScjcycgLz4KCTx1c2UgeD0nMzIuOCcgeT0nMTcnIGZpbGwtb3BhY2l0eT0nMC4xNScgeGxpbms6aHJlZj0nI3MnIC8+Cgk8dXNlIHg9Jy00MC44JyB5PScyMS4yJyB0cmFuc2Zvcm09J21hdHJpeCgtMSAwIDAgMSAwIDApJyBmaWxsLW9wYWNpdHk9JzAuNDQ5OTk5OTk5OTk5OTk5OTYnIHhsaW5rOmhyZWY9JyNzJyAvPgoJPHVzZSB4PSc0MScgeT0nLTQnIGZpbGwtb3BhY2l0eT0nMC4zJyB4bGluazpocmVmPScjcycgLz4KCTx1c2UgeD0nLTQ4Ljk5OTk5OTk5OTk5OTk5JyB5PScwLjInIHRyYW5zZm9ybT0nbWF0cml4KC0xIDAgMCAxIDAgMCknIGZpbGwtb3BhY2l0eT0nMC4zJyB4bGluazpocmVmPScjcycgLz4JCgk8dXNlIHg9JzQxJyB5PSc0LjQnIGZpbGwtb3BhY2l0eT0nMC42JyB4bGluazpocmVmPScjcycgLz4KCTx1c2UgeD0nLTQ4Ljk5OTk5OTk5OTk5OTk5JyB5PSc4LjYnIHRyYW5zZm9ybT0nbWF0cml4KC0xIDAgMCAxIDAgMCknIGZpbGwtb3BhY2l0eT0nMC4zJyB4bGluazpocmVmPScjcycgLz4JCgk8dXNlIHg9JzQxJyB5PScxMi44JyBmaWxsLW9wYWNpdHk9JzAuNDQ5OTk5OTk5OTk5OTk5OTYnIHhsaW5rOmhyZWY9JyNzJyAvPgoJPHVzZSB4PSctNDguOTk5OTk5OTk5OTk5OTknIHk9JzE3JyB0cmFuc2Zvcm09J21hdHJpeCgtMSAwIDAgMSAwIDApJyBmaWxsLW9wYWNpdHk9JzAuMycgeGxpbms6aHJlZj0nI3MnIC8+Cgk8dXNlIHg9JzQxJyB5PScyMS4yJyBmaWxsLW9wYWNpdHk9JzAuMycgeGxpbms6aHJlZj0nI3MnIC8+Cgk8L2c+Cgk8dXNlIHg9Jy00OC45OTk5OTk5OTk5OTk5OScgeT0nMjUuMjAwMDAwMDAwMDAwMDAzJyB0cmFuc2Zvcm09J21hdHJpeCgtMSAwIDAgMSAwIDApJyB4bGluazpocmVmPScjYicgLz4KCTx1c2UgeD0nLTk4LjE5OTk5OTk5OTk5OTk5JyB5PSctMTYuOCcgdHJhbnNmb3JtPSdtYXRyaXgoLTEgMCAwIC0xIDAgMCknIHhsaW5rOmhyZWY9JyNiJyAvPgoJPHVzZSB4PSc0OS4xOTk5OTk5OTk5OTk5OTYnIHk9Jy0zMy42JyB0cmFuc2Zvcm09J21hdHJpeCgxIDAgMCAtMSAwIDApJyB4bGluazpocmVmPScjYicgLz4KCTx1c2UgeD0nNDkuMTk5OTk5OTk5OTk5OTk2JyB5PSctNTguODAwMDAwMDAwMDAwMDA0JyB0cmFuc2Zvcm09J21hdHJpeCgxIDAgMCAtMSAwIDApJyB4bGluazpocmVmPScjYicgLz4KPC9zdmc+Cg==');
}

.test{
  margin-bottom:10px;
}

.original{
  color:#555;
  background-color: #f5f5f5;
  text-decoration: none;
  position: relative;
  padding: 0.5em 0.5em;
  display: block;
  width: 35%;
  margin: 0px auto;
  background-image: -o-linear-gradient(bottom, rgb(206, 206, 206) 0%, rgb(252, 252, 252) 100%);
  background-image: -moz-linear-gradient(bottom, rgb(206, 206, 206) 0%, rgb(252, 252, 252) 100%);
  background-image: -webkit-linear-gradient(bottom, rgb(206, 206, 206) 0%, rgb(252, 252, 252) 100%);
  background-image: -ms-linear-gradient(bottom, rgb(206, 206, 206) 0%, rgb(252, 252, 252) 100%);
  background-image: -webkit-gradient( linear, left bottom, left top, color-stop(0, rgb(206, 206, 206)), color-stop(1, rgb(252, 252, 252)) );
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  -o-border-radius: 5px;
  border-radius: 5px;
  -webkit-box-shadow: inset 0px 1px 0px #EBEBEB, 0px 5px 0px 0px #A8A8A8, 0px 7px 2px #999;
  -moz-box-shadow: inset 0px 1px 0px #EBEBEB, 0px 5px 0px 0px #A8A8A8, 0px 7px 2px #999;
  -o-box-shadow: inset 0px 1px 0px #EBEBEB, 0px 5px 0px 0px #A8A8A8, 0px 7px 2px #999;
  box-shadow: inset 0px 1px 0px #EBEBEB, 0px 5px 0px 0px #A8A8A8, 0px 7px 2px #999;
}

window.twttr = (function(d, s, id) {
  var js, fjs = d.getElementsByTagName(s)[0],
    t = window.twttr || {};
  if (d.getElementById(id)) return;
  js = d.createElement(s);
  js.id = id;
  js.src = "https://platform.twitter.com/widgets.js";
  fjs.parentNode.insertBefore(js, fjs);
 
  t._e = [];
  t.ready = function(f) {
    t._e.push(f);
  };
 
  return t;
}(document, "script", "twitter-wjs"));

twttr.ready(function (twttr) {
	twttr.events.bind('tweet', tweetIntent);
	twttr.events.bind('click', clickIntent);
});

function tweetIntent(intentEvent) {
	if (!intentEvent) return;
    alert('tweet')
}

function clickIntent(intentEvent) {
	if (!intentEvent) return;
    alert('click')
}