最近做了一个前端项目，其中有需求：通过button直接把input或者textarea里的值复制到粘贴板里。下面小编给大家分享JavaScript实现复制内容到粘贴板代码，需要的朋友参考下
最近做了一个前端项目，其中有需求：通过button直接把input或者textarea里的值复制到粘贴板里。下面小编把我实现思路及代码分享给大家，大家可以直接引入项目中。
具体代码如下所示：
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; }
我们可以这样直接调用这个方法：
copyToClipboard(document.getElementById("name"));
这样id为name的值进入了粘贴板了。
关于JavaScript实现复制内容到粘贴板代码小编就给大家介绍到这里，希望对大家有所帮助！
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