JavaScript實現複製內容到粘貼板代碼_javascript技巧

最近做了一個前端項目，其中有需求：通過button直接把input或者textarea裡的值複製到粘貼板裡。下面小編把我實現思路及代碼分享給大家，大家可以直接引入項目中。

具體代碼如下所示：

function copyToClipboard(elem) {// create hidden text element, if it doesn't already existvar 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 copytarget = elem;origSelectionStart = elem.selectionStart;origSelectionEnd = elem.selectionEnd;} else {// must use a temporary form element for the selection and copytarget = 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 contentvar currentFocus = document.activeElement;target.focus();target.setSelectionRange(0, target.value.length);// copy the selectionvar succeed;try {succeed = document.execCommand("copy");} catch(e) {succeed = false;}// restore original focusif (currentFocus && typeof currentFocus.focus === "function") {currentFocus.focus();}if (isInput) {// restore prior selectionelem.setSelectionRange(origSelectionStart, origSelectionEnd);} else {// clear temporary contenttarget.textContent = "";}return succeed;}

我們可以這樣直接調用這個方法：

copyToClipboard(document.getElementById("name"));

這樣id為name的值進入了粘貼板了。

關於JavaScript實現複製內容到粘貼板代碼小編就給大家介紹到這裡，希望對大家有所協助！