Clipboard.js JavaScript copy-paste library without Flash_javascript tips

<script src="clipboard.min.js"></script>
 <textarea id="bar" cols="62" rows="5" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false">脚本之家是国内专业的网站建设资源、脚本编程学习类网站，提供asp、php、asp.net、javascript、jquery、vbscript、dos批处理、网页制作、网络编程、网站建设等编程资料。</textarea>

<!-- Trigger -->
<button class="btn" data-clipboard-action="copy" data-clipboard-target="#bar">
  Cut to clipboard
</button>
<script>
var clipboard = new Clipboard('.btn');
clipboard.on('success', function(e) {
  console.info('Action:', e.action);
  console.info('Text:', e.text);
  console.info('Trigger:', e.trigger);
alert("复制成功");
  e.clearSelection();
});

clipboard.on('error', function(e) {
  console.error('Action:', e.action);
  console.error('Trigger:', e.trigger);
});
</script>

<script src="dist/clipboard.min.js"></script>
<button class="btn">
<script type="text/javascript">
var clipboard = new Clipboard('.btn');

clipboard.on('success', function(e) {
  console.info('Action:', e.action);
  console.info('Text:', e.text);
  console.info('Trigger:', e.trigger);

  e.clearSelection();
});

clipboard.on('error', function(e) {
  console.error('Action:', e.action);
  console.error('Trigger:', e.trigger);
});
</script>