是否有一种有效的方法让按钮自动将文本复制到剪贴板？ （JavaScript的）

Question

所以我已经阅读了关于如何将文本复制到剪贴板的整篇文章，但这些文章似乎都与我正在寻找的内容相匹配。 How do I copy to the clipboard in JavaScript?

该程序有几个字段可以输入文本，然后将其复制并放入其他几个应用程序中。我在IE中找到了一种快速的方法，但它不适用于任何其他浏览器。这是HTML。

<SPAN ID="copytext" STYLE="height:150;width:162;background-color:pink">
This text will be copied onto the clipboard when you click the button below. Try it!
</SPAN>
<TEXTAREA ID="holdtext" STYLE="display:none;">
</TEXTAREA>
<BUTTON onClick="ClipBoard();">Copy to Clipboard</BUTTON>

然后是JavaScript。

<SCRIPT LANGUAGE="JavaScript">

function ClipBoard() 
{
holdtext.innerText = copytext.innerText;
Copied = holdtext.createTextRange();
Copied.execCommand("Copy");
}

</SCRIPT>

该程序不能像Zero Clipboard或Clippy那样，因为如果我将它放在没有这些库的不同计算机上，它仍然需要工作。我最好的镜头是在本文顶部发布的链接上。它使用jQuery。

var copyTextareaBtn = document.querySelector('.js-textareacopybtn');

copyTextareaBtn.addEventListener('click', function(event) {
  var copyTextarea = document.querySelector('.js-copytextarea');
  copyTextarea.select();

try {
  var successful = document.execCommand('copy');
  var msg = successful ? 'successful' : 'unsuccessful';
  console.log('Copying text command was ' + msg);
} catch (err) {
  console.log('Oops, unable to copy');}});

所以这对于一个领域来说非常有用，但是我所学到的关于编程的一切都告诉我不要一遍又一遍地重复自己。特别是如果我每次重复它只改变一件事。有一个更好的方法吗？或者jQuery和重复是我此时唯一的选择？

Answer 1

我最近用过这个

 document.getElementById("copyButton").addEventListener("click", function() {
    copyToClipboard(document.getElementById("hexVal"));
});

function copyToClipboard(elem) {
      // create hidden text element, if it doesn't already exist
    var targetId = "_hiddenCopyText_";
    var isInput = elem.tagName === "INPUT" || elem.tagName === "TEXTAREA";
    var origSelectionStart, origSelectionEnd;
    if (isInput) {
        // can just use the original source element for the selection and copy
        target = elem;
        origSelectionStart = elem.selectionStart;
        origSelectionEnd = elem.selectionEnd;
    } else {
        // must use a temporary form element for the selection and copy
        target = document.getElementById(targetId);
        if (!target) {
            var target = document.createElement("textarea");
            target.style.position = "absolute";
            target.style.left = "-9999px";
            target.style.top = "0";
            target.id = targetId;
            document.body.appendChild(target);
        }
        target.textContent = elem.textContent;
    }
    // select the content
    var currentFocus = document.activeElement;
    target.focus();
    target.setSelectionRange(0, target.value.length);

    // copy the selection
    var succeed;
    try {
          succeed = document.execCommand("copy");
    } catch(e) {
        succeed = false;
    }
    // restore original focus
    if (currentFocus && typeof currentFocus.focus === "function") {
        currentFocus.focus();
    }

    if (isInput) {
        // restore prior selection
        elem.setSelectionRange(origSelectionStart, origSelectionEnd);
    } else {
        // clear temporary content
        target.textContent = "";
    }
    return succeed;
}


<input type="text" id="hexVal" />
<span id="copyButton">Copy</span>