Question

在尝试理解有关如何将文本复制到剪贴板的不同方法方面，我遇到了很多问题。如果有人可以向我解释为什么我的代码不起作用，我将不胜感激。

<!DOCTYPE HTML>
<html dark= "true" style="font-size: 50px;font-family: Roboto, Arial, sans-serif">
<body>
  <textarea id="copytext">ROGER</textarea>
  <div class="button" id="adadad">
    <button onclick="copyS()" id="dlld">
    </button>
  </div>
<p> </p>
<script type=text/javascript">
function copyS{ 
clicked = document.getElementById("dlld");
}
if ("dlld" == clicked){
   var am1 = document.getElementById("copytext");
   document.execCommand("copy");
}
}
</script>
<p> </p>
</body>
</html>

Answer 1

似乎您需要先select()来自文本区域的文本。尝试将功能更改为：

function copyS{ 
   var clicked = document.getElementById("dlld");

   //if ("dlld" == clicked){ //Not sure you need this
      var am1 = document.getElementById("copytext");
      am1.select();
      document.execCommand("copy");
   //}
}

希望有帮助！

Answer 2

好的，我对您的代码做了一些调整，但是现在应该可以了。

<!DOCTYPE HTML>
<html dark= "true" style="font-size: 50px;font-family: Roboto, Arial, sans-serif">
  <body>
    <textarea id="copytext">ROGER</textarea>
    <div class="button" id="adadad">
      <button onclick="copyS()" id="dlld">Copy text</button>
    </div>
    <p> </p>

    <!-- removed the single " at the end of your script tag -->
    <script type=text/javascript>
      //added () after you declared your function
      function copyS(){ 
        clicked = document.getElementById("dlld");
        //added .id to clicked. Not sure why you need to do this, but it works now
        if ("dlld" == clicked.id){
          var am1 = document.getElementById("copytext");
          //you need to select before running the .execCommand
          am1.select();
          document.execCommand("copy");
        }
      }
    </script>

    <p> </p>
  </body>
</html>

Answer 3

我已更改您的代码以完成工作。

var copiedText = "";
document.querySelector("button").onclick = function(e) {
  copiedText = e.target.previousElementSibling.value;
  document.execCommand("copy");
}

document.body.oncopy = function(e) {
  event.clipboardData.setData('text/plain', copiedText);
  event.preventDefault();
};

body {
  font-size: 50px;
  font-family: Roboto, Arial, sans-serif;
}

<textarea>ROGER</textarea>
<button>Copy</button>

Answer 4

尝试

(<button id="demo" onclick="copyToClipboard(document.getElementById('demo').innerHTML)">This is what I want to copy</button>)

(<script>
function copyToClipboard(text) {
window.prompt("Copy to clipboard: Ctrl+C, Enter", text);
}
</script>)

无法使用JavaScript将文本复制到剪贴板

4 个答案: