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實例代碼( Tip: 登錄后體驗更佳 )
<!DOCTYPE html>
<html>
<body>
<h1>My First JavaScript</h1>
<p id="demo">
JavaScript can react to events. Like the click of a button.
</p>
<script>
function myFunction()
{
document.getElementById("demo").innerHTML="Hello JavaScript!";
}
</script>
<button type="button" onclick="myFunction()">Click Me!</button>
</body>
</html>
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