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52 lines (46 loc) · 942 Bytes
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Click me!</title>
<style>
body, button { margin: 10px; }
div { padding: 10px; }
</style>
<script>
/*
//
// The version without the closure...
//
var count = 0;
window.onload = function() {
var button = document.getElementById("clickme");
button.onclick = handleClick;
};
function handleClick() {
var message = "You clicked me ";
var div = document.getElementById("message");
count++;
div.innerHTML = message + count + " times!";
}
*/
//
// The version with the closure.
//
window.onload = function() {
var count = 0;
var message = "You clicked me ";
var div = document.getElementById("message");
var button = document.getElementById("clickme");
button.onclick = function() {
count++;
div.innerHTML = message + count + " times!";
};
};
</script>
</head>
<body>
<button id="clickme">Click me!</button>
<div id="message"></div>
</body>
</html>