Get done tasks from Jira

doneTasks.js

var columns = Array.from(document.querySelectorAll('.ghx-column-title')).map(
  (title) => `${title.textContent}\n${'*'.repeat(title.textContent.length + 5)}`
);
document.querySelectorAll('.ghx-columns').forEach((col) => {
  const cols = col.querySelectorAll('.ghx-column');
  cols.forEach((col, i) => {
    col.querySelectorAll('.ghx-issue-fields').forEach((ele) => {
      const mev = ele.querySelector('.ghx-key').textContent;
      const txt = ele.querySelector('.ghx-inner').textContent;
      columns[i] += `\n${mev}: ${txt}`;
    });
  });
});
copy(columns.join('\n\n'));

Instructions

1. open developer toolbar while in Jira and
2. Run the script
3. You will get a grouped list of taske in the sprint.