Open Trello card, hover over task item, press shift+F1… Now your task's text is copied to clipboard!

tasks.js

// I have used this script with Tampermonkey to automatically inject it

const $ = window.$;

window.task = '';

const bind = () => {
  $('.checklist-item-details-text').each( (i, el) => {
    if ( el.classList.contains('mouseenter-event') ) { return };
    $(el).mouseenter( e => { window.task = e.currentTarget.innerText } );
    el.classList.add('mouseenter-event');
  });
};

$(document).keydown( e => {
  if (e.keyCode === 112 && e.shiftKey) { navigator.clipboard.writeText(window.task) }
});

function check() {
  if ($('body.window-up').length) {
    bind();
    return setTimeout(check, 1000);
  }
  return setTimeout(check, 1000);
}

check();