随机字符串生成器 - WebCat - 常规

<!DOCTYPE html>
<html>
  <head>
	<meta charset="utf-8" name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
	<title>WebCat</title>
	<script src="js/jquery.min.js"></script>
	<script src="js/wc-3.0.6.min.js"></script>
  </head>
  <body>	
	<h1 id="title">Hello world</h1>
	<p id="p1">点击生成随机字符串</p>
	<script>
		const options = ['1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'];
<pre><code>	function generateRandomString() {
		let selected = [];
		while(selected.length &lt; 12) {
			let randomIndex = Math.floor(Math.random() * options.length);
			let randomChar = options[randomIndex];
			if(selected.indexOf(randomChar) === -1) {
				selected.push(randomChar);
			}
		}
		$('#title').text(selected.join('') );
	}
	
    p1.onclick = generateRandomString;
&lt;/script&gt;  
</code></pre>
  </body>
</html>