is moved while we're "tracking" (that is, while a // line is being rubber-banded), erase the old rubber-band released while we're tracking, release // the mouse if it's currently captured, erase the last rubber-band
ec-flash" class="an-a">flash rubber-band opacity: 1; } 25%, 75% { opacity: 0; } } .ec-rubber-band { animation: rubber-band 1s; } .ec-rubber-band-fast { animation: rubber-band .5s; } @keyframes rubber-band { from {