javascript - Copy to clipboard buttons -

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i want create "copy clipboard" buttons work on our sharepoint. should placed in few different places, , need copy text from specific field on page (ex. list of emails).

i know, can select text , copy it, quite often, having button automatically copies text clipboard useful.

i did manage create 1 in script editor, pasted whole code below (which found on internet)

<!doctype html> <html> <head>  <script type='text/javascript'>//<![cdata[ window.onload=function(){ document.getelementbyid("copybutton").addeventlistener("click", function() {     copytoclipboardmsg(document.getelementbyid("copytarget"), "msg"); });  document.getelementbyid("copybutton2").addeventlistener("click", function() {     copytoclipboardmsg(document.getelementbyid("copytarget2"), "msg"); });  document.getelementbyid("pastetarget").addeventlistener("mousedown", function() {     this.value = ""; });   function copytoclipboardmsg(elem, msgelem) {       var succeed = copytoclipboard(elem);     var msg;     if (!succeed) {         msg = "copy not supported or blocked.  press ctrl+c copy."     } else {         msg = "text copied clipboard."     }     if (typeof msgelem === "string") {         msgelem = document.getelementbyid(msgelem);     }     msgelem.innerhtml = msg;     settimeout(function() {         msgelem.innerhtml = "";     }, 2000); }  function copytoclipboard(elem) {       // create hidden text element, if doesn't exist     var targetid = "_hiddencopytext_";     var isinput = elem.tagname === "input" || elem.tagname === "textarea";     var origselectionstart, origselectionend;     if (isinput) {         // can use original source element selection , copy         target = elem;         origselectionstart = elem.selectionstart;         origselectionend = elem.selectionend;     } else {         // must use temporary form element selection , 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 content     var currentfocus = document.activeelement;     target.focus();     target.setselectionrange(0, target.value.length);      // copy 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; }   }//]]>   </script>   </head>  <body>   <input id="copytarget" value="some initial text"> <button id="copybutton">copy</button><br><br> <span id="copytarget2">some other text</span> <button id="copybutton2">copy</button><br><br> <input id="pastetarget"> click in field , hit ctrl+v see on clipboard<br><br> <span id="msg"></span><br>    </body>  </html>

but have main problems it: 1) reloads page every time click "copy" button 2) not elegant , friendly, when think updating our documents

i grateful hints may have me, on how make work better.

this project may help: clipboardjs


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