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裡的值復制到粘貼板裡。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 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實現復制內容到粘貼板代碼小編就給大家介紹到這裡,希望對大家有所幫助!