Copy new branch name to clipboard on issue page in GitLab

main.js

(function () {
  try {
    var newBranchButton = document.querySelector('#new-branch > a.available');
    var title = newBranchButton.title || newBranchButton.dataset.originalTitle;
    if (!title) {
      alert("Can't find New Branch button");
      return;
    }
    var copied = false;
    try {  
      var element = document.createElement('span');
      element.innerHTML = title;
      document.body.appendChild(element);
      var range = document.createRange();
      range.selectNode(element);
      var selection = window.getSelection();
      selection.addRange(range);
      copied = document.execCommand('copy');
      document.body.removeChild(element);
    } catch (e) { }
    selection.removeAllRanges();
    if (copied) {
      alert("Copied "+title+" to clipboard");
    } else {
      prompt("Can't copy title. Do it yourself", title);
    }
  } catch (e) {
    alert("Can't find element to copy from");
  }
})();

main.min.js

!function(){try{var e=document.querySelector("#new-branch > a.available"),t=e.title||e.dataset.originalTitle;if(!t)return void alert("Can't find New Branch button");var n=!1;try{var a=document.createElement("span");a.innerHTML=t,document.body.appendChild(a);var o=document.createRange();o.selectNode(a);var c=window.getSelection();c.addRange(o),n=document.execCommand("copy"),document.body.removeChild(a)}catch(r){}c.removeAllRanges(),n?alert("Copied "+t+" to clipboard"):prompt("Can't copy title. Do it yourself",t)}catch(r){alert("Can't find element to copy from")}}();