CLEAR INPUT ON FOCUS

Run
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>HTML</title>
</head>
<body>
    <h2> clear input field on focus </h2>
    <input type="text" onfocus="this.value='';" value="Click">
    <p> Focus on input to see effect</p>
</body>
</html>