multiple.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Delegate</title>
</head>
<body>
<!-- 1. Write some markup -->
<ul>
<li><button>Item 1</button></li>
<li><button>Item 2</button></li>
<li><button>Item 3</button></li>
<li><button>Item 4</button></li>
<li><button>Item 5</button></li>
</ul>
<ul>
<li><span>Item 6</span></li>
<li><span>Item 7</span></li>
</ul>
<!-- 2. Include library -->
<script src="../dist/delegate.js"></script>
<!-- 3. Add event delegation -->
<script>
var ul = document.querySelector('ul');
delegate(ul, 'button', 'click', function(e) {
console.log(e.target);
});
delegate(document.body, 'span', 'click', function(e) {
console.log(e.target);
});
</script>
</body>
</html>